*****TBD*****

This subclass is indented under the class definition. Alloys or metallic composition which is claimed as being radioactive, containing an isotope of an element of which is radioactive or containing an element of which all known isotopes are radioactive.

(1) Note. The elements of which all known isotopes are radioactive are technetium, promethium and all elements of atomic number 84 and higher.

2	. Actinide base singly or in combination:

	This subclass is indented under subclass 1. Alloy or metallic composition in which contains over 50 percent of a single metal of atomic number 89 to 103 inclusive, or wherein the total of all these metals taken together is over 50 percent of weight of the total alloy or metallic composition.

3	.. Uranium base:

	This subclass is indented under subclass 2. Alloy or metallic composition which contains over 50 percent uranium.

	This subclass is indented under subclass 1. Alloy or metallic composition which contains over 50 percent iron.

5	. Magnesium base:

	Alloy or metallic composition under subclass I which contains over 50 percent magnesium.

6	. Nickel or cobalt base:

	This subclass is indented under subclass 1. Alloy or metallic composition which contains over 50 percent nickel or over 50 percent cobalt.

7	. Aluminum base:

	This subclass is indented under subclass 1. Alloy or metallic composition which contains over 50 percent aluminum.

8	Ferrous (i.e., iron base):

This subclass is indented under the class definition. Alloy or metallic composition containing over 50 percent of iron.

(1) Note. This and indented subclasses will take so called ferralloys e.g., ferrosilicon, etc., where the percentage of iron is not specified. Where there are indented subclasses hereunder which provide for different percentages of alloying ingredient e.g., chromium, the patent is classified in the subclass providing for the largest percentage of alloying ingredient in the absence of recitations that a smaller percentage is present.

9	. 1.7 percent or more carbon containing:

This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains 1.7 percent or more carbon.

(1) Note. This and indented subclasses contain patents drawn to graphitic steel.

10	.. Six percent or more total group IV, V, or VII transition metals containing:

This subclass is indented under subclass 9. Alloys or metallic composition which additionally contains 6 percent or more total content of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, or tungsten, singly or in combination.

(1) Note. Many patents in this and indented subclasses are so called "hard facing" alloys, which contain a high concentration of hard carbide precipitates.

11	... Eight percent or more chromium containing:

	This subclass is indented under subclass 10. Alloy or metallic composition which additionally contains 8 percent or more of chromium.

12	.... Molybdenum, tungsten or vanadium containing:

	This subclass is indented under subclass 11. Alloy or metallic composition which additionally contains one or more of molybdenum, tungsten or vanadium.

13	.. 2.7 percent or more carbon equivalent containing:

This subclass is indented under subclass 9. Alloy or metallic composition in which the total of the carbon content plus one third the silicon content plus one sixth the phosphorus content is 2.7 percent or more, i.e., cast iron.

(1) Note. The recitation "cast iron" shall be taken a indicating a carbon equivalent of 2.7 percent or more in the absence of a specific disclosure to the contrary.

14	... Boron containing:

	This subclass is indented under subclass 13. Alloy or metallic composition which additionally contains boron.

15	... Chromium containing:

	This subclass is indented under subclass 13. Alloy or metallic composition ... which additionally contains chromium.

16	.... Nickel containing:

	This subclass is indented under subclass 15. Alloy or metallic composition which additionally contains nickel.

17	..... Molybdenum:

	This subclass is indented under subclass 16. Alloy or metallic composition additionally contains molybdeum.

18	... Process of adding magnesium:

This subclass is indented under subclass 13. Processes of preparing an alloy or metallic composition wherein magnesium is added to the alloy or metallic composition.

(1) Note. The magnesium is usually added to cause carbon in the molten alloy to precipitate in spherical form, thus increasing the strength and ductility of the solid alloy, i.e., production of so called "nodular iron" or "spherulitic cast iron" etc.

19	.... Adding magnesium as a liquid, vapor or as a solid agent entrained by a gas (e.g., fluidized):

This subclass is indented under subclass 18. Process of adding magnesium to an alloy or metallic composition where the magnesium is added in molten form as a liquid, is vaporized and added to the alloy metallic composition in the gaseous state or wherein a solid agent containing magnesium is entrained in a gas and added to the alloy or metallic composition while so entrained.

(1) Note. The recitation that a solid magnesium additive is added in a "fluidized" state renders a patent appropriate for this subclass.

20	.... Flowing molten iron alloy onto solid magnesium containing agent, or adding solid magnesium containing agent to molten stream of iron alloy:

This subclass is indented under subclass 18. Process wherein a molten stream of iron alloy is poured onto a solid magnesium containing agent, e.g., in the bottom of a vessel, or wherein a solid magnesium containing agent is added to a molten stream of iron alloy, e.g., by continuously adding particles of agent to the molten stream.

SEE OR SEARCH CLASS:

164,	Metal Founding, appropriate subclasses for similar processes wherein the solid magnesium containing agent is placed in a mold, followed by pouring molten iron, or wherein the molten iron is recited as being treated by a solid magnesium containing agent while being poured into a mold.

21	.... Mechanically plunging magnesium containing agent below surface of iron alloy melt:

	This subclass is indented under subclass 18. Processes wherein the magnesium containing agent is mechanically forced below the surface of the iron alloy melt, e.g., by employing a plunging bell.

22	.... Separate addition of plural agents, at least one containing magnesium:

This subclass is indented under subclass 18. Process wherein plural agents of different compositions are separately added to an alloy or metallic compositions under subclass 13, at least one of the agents containing magnesium.

(1) Note. The additions of plural agents may be separated by physical location or separated by time.

23	.... Magnesium containing agent is coated, impregnated or compacted (e.g., briquetted, coated particles):

	This subclass is indented under subclass 18. Processes wherein the magnesium is contained in an agent which is coated, impregnated or compacted e.g., briquettes.

24	.... Magnesium present in agent only as a compound with a nonmetal:

This subclass is indented under subclass 18. Process wherein the magnesium is added to the iron alloy only as a compound with a nonmetal and the additive contains no metallic magnesium or alloy thereof.

(1) Note. To be classified in this subclass, there must be a positive disclosure that the magnesium compound decomposes or reacts to yield metallic magnesium in the iron alloy. In the absence of such disclosure a patent is classified elsewhere under subclasses 13+ as appropriate.

25	.... In agent also containing silicon, rare earth or alkaline earth metal:

	This subclass is indented under subclass 18. Processes wherein magnesium in the iron alloy in an agent which additionally contain at least one of silicon, scandium, yttrium, a lanthanide metal, calcium, strontium or barium.

26	... Copper containing:

	This subclass is indented under subclass 13. Alloy or metallic composition which additionally contains copper.

27	... Nickel or molybdenum:

	This subclass is indented under subclass 13. Alloy or metallic composition which additionally contains at least one of nickel or molybdenum.

28	... Over .1 percent aluminum containing:

	This subclass is indented under subclass 13. Alloy or metallic composition which additionally contains more than 0.1 percent of aluminum.

29	... Processes:

	This subclass is indented under subclass 13. Processes of manufacturing an alloy or metallic composition .

30	.... Adding rare earth or alkaline earth metal:

	This subclass is indented under subclass 29. Process which includes a step of adding one or more of scandium, yttrium, a lantanide metal, calcium, strontium or barium to the alloy or metallic composition.

31	.... Adding sulfur, selenium or tellurium:

	This subclass is indented under subclass 29. Process which includes a step of adding one or more of sulfur, selenium or tellurium to the alloy or metallic composition.

32	.... Adding vanadium, titanium, niobium or zirconium:

	This subclass is indented under subclass 29. Process which includes a step of adding one or more of vanadium, titanium, niobium or zirconium to the alloy or metallic composition.

33	.... Adding silicon:

	This subclass is indented under subclass 29. Process which includes a step of adding silicon to the alloy or metallic composition.

34	. Nine percent or more chromium containing:

This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains 9 percent or more of chromium.

(1) Note. Many of the alloys classified in this and indented subclasses are called "stainless steel" because the presence of 9 percent or more chromium makes an iron base alloy relatively resistant to corrosion. The recitation that a ferrous alloy is a "stainless steel" will prima facie be taken is meaning that the alloy is properly classified in this or indented subclass in absence of a specific indication that the alloy does not contain 9 percent or more chromium.

35	.. Noble metal containing:

	This subclass is indented under subclass 34. Alloy or metallic composition which additionally contains one or more of silver, gold, ruthenium, rhodium, palladium, osmium, iridium or platinum.

36	.. Cobalt containing:

	This subclass is indented under subclass 34. Alloy or metallic composition which additionally contains cobalt.

37	... Molybdenum or tungsten containing:

	This subclass is indented under subclass 36. Alloy or metallic composition which additionally contains at least one of molybdenum or tungsten.

38	.... Nickel containing:

	This subclass is indented under subclass 37. Alloy or metallic composition which additionally contains nickel.

39	.... Copper containing:

	This subclass is indented under subclass 37. Alloy or metallic composition which additionally contains copper.

40	.. Rare earth containing:

	This subclass is indented under subclass 34. Alloy or metallic composition which additionally contains at least one of scandium, yttrium or a lanthanide metal.

41	.. Lead, bismuth, antimony, calcium, selenium or tellurium containing:

This subclass is indented under subclass 34. Alloy or metallic composition which additionally contains at least one of lead, bismuth, antimony, calcium or tellurium.

(1) Note. These materials are commonly added in small amounts to improve the machinability of the alloy.

42	.. Over 0.05 percent sulfur, over 0.04 percent phosphorus or sulfur or phosphorus added in any amount to promote machinability:

	This subclass is indented under subclass 34. Alloys or metallic composition which contains one or more of more than 0.05 percent sulfur or more than 0.04 percent phosphorus or which contain any amount of sulfur or phosphorus which is positively stated to be present to promote machinability of this alloy or metallic composition.

43	.. Eight percent or more nickel containing:

This subclass is indented under subclass 34. Alloy or metallic composition which additionally contains 8 percent or more of nickel.

(1) Note. This amount of nickel usually renders the alloy austenitic.

SEE OR SEARCH THIS CLASS, SUBCLASS:

56,	for austenitic stainless steel which contains less than 8 percent nickel but which contains manganese instead to bring the total of the two elements to over 8 percent.

44	... Over 2 percent manganese containing:

	This subclass is indented under subclass 43. Alloy or metallic composition which additionally contains more than 2 percent of manganese.

45	.... Copper containing:

	This subclass is indented under subclass 44. Alloy or metallic composition which additionally contains copper.

46	.... Molybdenum or tungsten containing:

	This subclass is indented under subclass 44. Alloy or metallic composition which additionally contains one or more of molybdenum or tungsten.

47	..... Group IV or V transition metal containing:

	This subclass is indented under subclass 46. Alloy or metallic composition which additionally contains one or more of titanium, zirconium, hafnium, vanadium, niobium or tantalum.

48	.... Group IV or v transition metal containing:

	This subclass is indented under subclass 44. Alloy or metallic composition which additionally contains one or more of titanium, zirconium, hafnium, vanadium, niobium or tantalum

49	... Copper containing:

	This subclass is indented under subclass 43. Alloy or metallic composition which additionally contains copper.

50	... Over 1.5 percent silicon containing:

	This subclass is indented under subclass 43. Alloy or metallic composition which additionally contains more than 1.5 percent silicon.

51	.... Group IV or V transition metal containing:

	This subclass is indented under subclass 50. Alloy or metallic composition which additionally contains one or more of titanium, zirconium, hafnium, vanadium, niobium or tantalum.

52	... Molybdenum containing:

	This subclass is indented under subclass 43. Alloy or metallic composition which additionally contains molybdenum.

53	.... Group IV or V transition metal containing:

	This subclass is indented under subclass 52. Alloy or metallic composition which additionally contains one or more of titanium, zirconium, hafnium, vanadium, niobium or tantaium.

54	... Group IV or V transition metal containing:

	This subclass is indented under subclass 43. Alloy or metallic composition which additionally contains one or more titanium, zirconium, hafnium, vanadium, niobium or tantalum.

55	... Over 0.1 percent carbon containing:

	This subclass is indented under subclass 43. Alloy or metallic composition which additionally contains more than 0.1 percent of carbon.

56	.. Eight percent or more total nickel plus manganese containing:

This subclass is indented under subclass 34. Alloy or metallic composition which additionally contains a total quantity of nickel plus manganese of 8 percent or more.

(1) Note. When the alloy contains 8 percent or more manganese, nickel may be completely absent.

(2) Note. This amount of nickel plus manganese usually renders the alloy austentic.

SEE OR SEARCH THIS CLASS, SUBCLASS:

43,	for authentic stainless steel which contains 8 percent or more nickel.

57	... Molybdenum or tungsten containing:

	This subclass is indented under subclass 56. Alloy or metallic composition which additionally contains one or more of molybdenum or tungsten.

58	... Copper containing:

	This subclass is indented under subclass 56. Alloy or metallic composition which additionally contains copper.

59	... Over 0.20 percent nitrogen containing:

	This subclass is indented under subclass 56. Alloy or metallic composition which additionally contains more than 0.20 percent nitrogen.

60	.. Copper containing:

	This subclass is indented under subclass 34. Alloy on metallic composition which additionally contains copper.

61	... Molybdenum or tungsten containing:

	This subclass is indented under subclass 60. Alloy or metallic composition which additionally contains one or more of molybdenum or tungsten.

62	.. Over 0.1 percent aluminium containing:

	This subclass is indented under subclass 34. Alloy or metallic composition which additionally contains more than 0.1 percent aluminum.

63	... Molybdenum or tungsten containing:

	This subclass is indented under subclass 62. Alloy or metallic compositions which additionally contains more of molybdenum or tungsten.

64	.. Boron containing:

	This subclass is indented under subclass 34. Alloy or metallic composition which additionally contains boron.

65	.. 0.25 percent or more nitrogen containing:

	This subclass is indented under subclass 34. Alloy or metallic composition which additionally contains 0.25 percent or more nitrogen.

66	... Group IV or V transition metal containing:

	This subclass is indented under subclass 65. Alloy or metallic composition which additionally contains one or more of titanium, zirconium, hafnium, vanadium, niobium or tantaium.

67	.. Molybdenum or tungsten containing:

	This subclass is indented under subclass 34. Alloy or metallic composition which additionally contains one or more of molybdenum or tungsten.

68	... Titanium, zirconium, or hafnium containing:

	This subclass is indented under subclass 67. Alloy or metallic composition which additionally contains one or more of titanium, zirconium or hafnium..

69	... Vanadium, niobium or tantalum containing:

	This subclass is indented under subclass 67. Alloy or metallic composition which additionally contains one or more of vanadium, niobium and tantalum.

70	.. Group IV or V transition metal containing:

	This subclass is indented under subclass 34. Alloy or metallic composition which additionally contains one or more of titanium, zirconium, hafnium, vanadium, niobium or tantalum.

71	.. Processes:

This subclass is indented under subclass 34. Processes of producing alloys or metallic composition .

(1) Note. While this subclass provides for processes of producing alloys under subclass 34 not specifically provided in the indents above, e.g., ferrochrome, it is also employed as a collecting point for cross-references to processes of general utility in preparing a wide range of alloys classified in different subclasses under subclass 34.

72	. Eight percent or more manganese containing:

This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains 8 percent or more of manganese.

(1) Note. The alloys classified in this and indented subclass are often referred to as "authenitic manganese steel" or "Hadfield steel". These recitations shall be considered prima facie sufficient for classification hereunder in the absence of an indication that the alloy does not contain 8 percent or more manganese.

73	.. Nickel containing:

	This subclass is indented under subclass 72. Alloy or metallic composition which additionally contains nickel.

74	.. Chromium containing:

	This subclass is indented under subclass 72. Alloy or metallic composition which additionally contains chromium.

75	.. Titanium containing:

	This subclass is indented under subclass 72. Alloy or metallic composition which additionally contains chromium.

76	.. Copper containing:

	This subclass is indented under subclass 72. Alloy or metallic composition which additionally contains copper.

77	. Four percent or more aluminium containing:

	This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains 4 percent or more aluminium.

78	.. Over 2 percent silicon containing:

	This subclass is indented under subclass 77. Alloy or metallic composition which additionally contains more than 2 percent silicon.

79	.. Chromium containing:

	This subclass is indented under subclass 77. Alloy or metallic composition which additionally contains chromium.

80	.. Nickel or cobalt containing:

	This subclass is indented under subclass 78. Alloy or metallic composition which additionally contains at least one of nickel or cobalt.

81	.. Zirconium, vanadium or titanium containing alloy or metallic composition:

	This subclass is indented under subclass 77. Alloy or metallic composition which additionally contains one or more of zirconium, vanadium or titanium.

82	. Noble metal containing:

	This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains one or more of silver, gold, ruthenium, rhodium, palladium, osmium, iridium or platinum.

83	. Rare earth metal containing:

	This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains one or more of scandium, yttrium or a lanthanide metal.

84	. Lead, bismuth, selenium, tellurium or calcium containing:

This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains one or more of lead, bismuth, selenium, tellurium or calcium.

(1) Note. These elements are usually added to ferrous alloys in small amounts to improve the machinability of the alloy.

85	.. Processes:

	This subclass is indented under subclass 84. Processes of incorporating one or more additional element under subclass 84 into a ferrous alloy.

86	... Adding lead:

	This subclass is indented under subclass 85. Processes wherein the added elements under subclass 84 includes lead.

87	. Over 0.05 percent sulfur, over 0.04 percent phosphorus, or sulfur or phosphorus added in any amount to promote machinability:

	This subclass is indented under subclass 8. Alloy or metallic composition which contains one or more of more than 0.05 percent sulfur or more than 0.04 percent phosphorus or which contain any amount of sulfur or phosphorus which is positively stated to be present to promote machinability of this alloy or metallic composition.

88	.. Processes of making or treating alloy containing over 0.04 percent phosphorus:

	This subclass is indented under subclass 87. Processes wherein an alloy containing over 0.04 Percent phosphorus is made or treated.

89	. Copper containing:

	This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains copper.

90	.. Chromium containing:

	This subclass is indented under subclass 89. Alloy or metallic composition which additionally contains chromium.

91	... Nickel containing:

	This subclass is indented under subclass 90. Alloy or metallic composition which additionally contains nickel.

92	.. Nickel containing:

	This subclass is indented under subclass 89. Alloy or metallic composition which additionally contains nickel.

93	.. Vanadium, zirconium, titanium or molybdenum containing:

	This subclass is indented under subclass 89. Alloy or metallic composition which additionally contains one or more vanadium, zirconium, titanium or molybdenum.

94	. Over 10 percent nickel containing:

This subclass is indented under subclass 89. Alloy or metallic composition which additionally contains more that 10 percent nickel.

(1) Note. Many of the alloys in this and indented subclasses are called "maraging" steels, which can be age hardened to very high levels of strength.

95	.. Cobalt containing:

	This subclass is indented under subclass 94. Alloy or metallic composition which additionally contains cobalt.

96	.. Molybdenum containing:

	This subclass is indented under subclass 94. Alloy or metallic composition which additionally contains molybdenum.

97	.. Chromium containing:

	This subclass is indented under subclass 94. Alloy or metallic composition which additional contains chromium.

98	.. Over 1 percent silicon containing:

	This subclass is indented under subclass 94. Alloy or metallic composition which additionally contains more that 1 percent.

99	. One percent or more carbon containing, but less than 1.7 percent:

This subclass is indented under subclass 8. Alloy or metallic composition containing 1 percent or more carbon.

(1) Note. Due to schedule superiority, alloys containing 1.7 percent or more carbon are classified above in subclasses 9+. Patents classified in subclasses 9+ above are not cross-referenced to this or indented subclasses unless there is a positive disclosure of an alloy containing less that 1.7 percent carbon.

100	.. Chromium containing:

This subclass is indented under subclass 99. Alloy or metallic composition which additionally contains chromium.

(1) Note. Many patents in this and indented subclasses are drawn to alloys which are sufficiently heat resistant to be used to cut metal at relatively high speed, i.e., "high speed" steel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

104+,

for so called "high speed" steel alloys containing less that 1 percent carbon.

101	... Molybdenum containing:

	This subclass is indented under subclass 100. Alloy or metallic composition which additionally contains molybdenum.

102	.... Cobalt containing:

	This subclass is indented under subclass 102. Alloy or metallic composition which additionally contains cobalt.

103	. Over 0.1 percent aluminum containing, but less than 4 percent:

This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains more that 0.1 percent aluminum.

(1) Note. Due to schedule superiority, alloys containing 4 percent or more aluminum are classified above in subclasses 77+. Patents classified in subclasses 77+ above are not cross referenced to this subclass unless there is a positive disclosure of an alloy containing less that 4 percent aluminum.

104	. Chromium containing, but less than 9 percent:

This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains chromium.

(1) Note. Due to schedule superiority, alloys containing 9 percent or more chromium are classified above in subclasses 34+. Patents classified in subclasses 34+ above are not cross-referenced to this or indented subclasses unless there is a positive disclosure of an alloy containing less than 9 percent chromium.

105	.. Molybdenum containing:

	This subclass is indented under subclass 104. Alloy or metallic composition which additionally containing molybdenum.

106	... Boron or beryllium containing:

	This subclass is indented under subclass 105. Alloy or metallic composition which additionally contains one or more of boron or beryllium.

107	... Cobalt containing:

	This subclass is indented under subclass 105. Alloy or metallic composition which additionally contains cobalt.

108	... Nickel containing:

	This subclass is indented under subclass 105. Alloy or metallic composition which additionally contains nickel.

109	.... Vanadium, titanium or zirconium containing:

	This subclass is indented under subclass 108. Alloy or metallic composition which additionally contains or or more of vanadium, titanium or zirconium.

110	... Titanium, zirconium or niobium containing:

	This subclass is indented under subclass 105. Alloy or metallic composition which additionally contains one or more of titanium, zirconium or niobium.

111	... Vanadium containing:

	This subclass is indented under subclass 104. Alloy or metallic composition which additionally contains nickel.

112	.. Nickel containing:

	This subclass is indented under subclass 104. Alloy or metallic composition which additionally contains nickel.

113	... Tungsten containing:

	This subclass is indented under subclass 112. Alloy or metallic composition which additionally contains tungsten.

114	.. Tungsten containing:

	This subclass is indented under subclass 104. Alloy or metallic composition which additionally contains tungsten.

115	.. Processes:

This subclass is indented under subclass 104. Processes of preparing an alloy or metallic composition .

(1) Note. While this subclass provides for processes of producing alloys under subclass 104 not specifically provided for in the indents above it is also employed as a collecting point for cross-references to processes of general utility in preparing a wide range of alloys classified in different subclasses under subclass 104.

116	... Including reducing a chromium compound:

	This subclass is indented under subclass 115. Process wherein metallic chromium is introduced into the product by reducing a chromium compound.

117	. Two percent or more silicon containing:

	This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains 2 percent or more silicon.

118	.. Titanium, molybdenum, tungsten or vanadium containing:

	This subclass is indented under subclass 117. Alloy or metallic composition which additionally contains one or more of titanium, molybdenum, tungsten or vanadium.

119	. Nickel containing, but 10 percent or less:

This subclass is indented under subclass 8. Alloy or metallic composition which additionally containing nickel.

(1) Note. Due to schedule superiority, alloys containing more that 10 percent nickel are classified above in subclasses 94+. Patents classified in subclasses 94+ above are not cross-referenced to this subclass unless there is a positive disclosure of any alloy containing 10 percent or less nickel.

120	. 1.5 percent or more manganese containing, but less than 8 percent:

This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains 1.5 percent or more manganese.

(1) Note. Due to schedule superiority, alloys containing 8 percent or more manganese are classified above in subclasses 72+. Patents classified in subclasses 72+ above are not cross- referenced to this subclass unless there is a positive disclosure of an alloy containing less than 8 percent manganese.

121	. Boron containing:

	This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains boron.

122	. Tungsten containing:

	This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains boron.

123	. Molybdenum containing:

	This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains molybdenum.

124	.. Vanadium tantalum or titanium containing:

	This subclass is indented under subclass 123. Alloy or metallic composition which additionally contains one or more of vanadium, tantalum, or titanium.

125	. Zirconium containing:

	This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains zirconium.

126	. Titanium containing:

	This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains titanium.

127	. Vanadium, tantanium or niobium containing:

	This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains one or more of vanadium, tantalum or niobium.

128	. Nitrogen containing:

	This subclass is indented under subclass 8. Alloy or metallic composition which additionally contains nitrogen.

129	. Processes:

This subclass is indented under subclass 8. Processes of preparing an alloy or metallic composition .

(1) Note. While this subclass provides for processes of producing alloys under subclass 8 not specifically provided for in the indents above it is also employed as a collecting point for cross-references to processes of general utility in preparing a wide range of alloys classified in different subclasses under subclass 8.

400	ALKALI METAL BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition s which contains over 50 percent of weight of a single metal selected from Lithium, Sodium, Potassium, Rubidium, or Cesium.

401	Beryllium base:

	This subclass is indented under the class definition. Alloy, or metallic composition s containing over 50 percent of beryllium by weight.

402	Magnesium base:

	This subclass is indented under the class definition. Alloy, or metallic composition containing over 50 percent magnesium by weight.

403	. Silver containing:

	This subclass is indented under subclass 402. Alloy, or metallic composition which additionally contains silver.

404	.. Manganese containing:

	This subclass is indented under subclass 403. Alloy, or metallic composition which additionally contains manganese.

405	. Lanthanide containing:

	This subclass is indented under subclass 402. Alloy, or metallic composition which additionally contains at least one of the metals lanthanum through lutetium, i.e., atomic numbers 57 through 71.

406	.. Zirconium containing:

	This subclass is indented under subclass 405. Alloy, or metallic composition additionally containing zirconium.

407	. Aluminum containing:

	This subclass is indented under subclass 402. Alloy, or metallic composition which additionally contains aluminum.

408	.. Zinc containing:

	This subclass is indented under subclass 407. Alloy, or metallic composition which additionally contains zinc.

409	... Manganese containing:

	This subclass is indented under subclass 408. Alloy, or metallic composition which additionally contains manganese.

410	.. Manganese containing:

	This subclass is indented under subclass 407. Alloy, or metallic composition which additionally contains manganese.

411	. Zinc containing:

	This subclass is indented under subclass 402. Alloy, or metallic composition which additionally contains zinc.

412	.. Manganese containing:

	This subclass is indented under subclass 411. Alloy, or metallic composition which additionally contains manganese.

413	. Manganese containing:

	This subclass is indented under subclass 402. Alloy, or metallic composition which additionally contains manganese.

414	. Zirconium containing:

	This subclass is indented under subclass 402. Alloy, or metallic composition which additionally contains zirconium.

415	Alkaline earth metal base:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of calcium, over 50 percent of strontium, or over 50 percent of barium.

416	Rare earth metal base singly or in combination:

This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent by weight of a single metal selected from scandium, yttrium, or lanthanum, through lutetium (i.e., atomic numbers 57 through 71), or wherein the total of all these metals taken together is over 50 percent by weight of the total alloy, or metallic composition.

(1) Note. Because the rare earths often occur together naturally and are not easily separated, they are often used as crude, or partially purified mixtures which have their own names e.g., misch metal, didymium, etc.

417	Titanium base:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of titanium by weight.

418	. Aluminum containing:

	This subclass is indented under subclass 417. Alloy, or metallic composition which additionally contains aluminum.

419	.. Tin containing:

	This subclass is indented under subclass 418. Alloy, or metallic composition which additionally contains tin.

420	.. Vanadium containing:

	This subclass is indented under subclass 418. Alloy, or metallic composition which additionally contains vanadium.

421	. Chromium or molybdenum containing:

	This subclass is indented under subclass 417. Alloy, or metallic composition which additionally contains at least one of the metals chromium, or molybdenum.

422	ZIRCONIUM OR HAFNIUM BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of zirconium or over 50 percent of hafnium.

423	. Copper containing:

	This subclass is indented under subclass 422. Alloy, or metallic composition which additionally contains copper.

424	VANADIUM BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition containing over 50 percent of vanadium.

425	NIOBIUM BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition containing over 50 percent of niobium.

426	. Titanium, zirconium or hafnium containing:

	This subclass is indented under subclass 425. Alloy, or metallic composition which additionally contains at least one of the metals titanium, zirconium, or hafnium.

427	TANTALUM BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of tantalum.

428	CHROMIUM BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of chromium.

429	MOLYBDENUM BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of molybdenum.

430	TUNGSTEN BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of tungsten.

431	. Carbon, boron or nitrogen containing:

This subclass is indented under subclass 430. Alloy, or metallic composition which additionally contains at least one of the elements, carbon, boron, or nitrogen.

SEE OR SEARCH CLASS:

75,

Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures, subclasses 230+ and 244 for particulate metal carbide (236+) boride, or nitrite (244) bonded with a metal (commonly cobalt), e.g., the so called "sintered carbides", etc. See the class definition of this class for the distinction between the alloys and metallic compositions of this class and the consolidated metal powder composition for Class 75.

423,

Chemistry of Inorganic Compounds, subclass 409 , for a pure, stoichiometric tungsten nitride, subclass 440, for a pure, stoichiometric tungsten carbide, subclass 297, for a pure, stoichiometric tungsten boride.

432	. Rhenium or noble metal containing:

	This subclass is indented under subclass 430. Alloy, or metallic composition which additionally contains at least one of the metals, rhenium, ruthenium, palladium, osmium, iridium, platinum, silver, or gold.

433	RHENIUM BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition containing over 50 percent of rhenium.

434	MANGANESE BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of manganese.

435	COBALT BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of cobalt.

436	. Chromium containing:

	This subclass is indented under subclass 435. Alloy, or metallic composition which additionally contains chromium.

437	.. Aluminum containing:

	This subclass is indented under subclass 436. Alloy, or metallic composition which additionally contains aluminum.

438	... Titanium containing:

	This subclass is indented under subclass 437. Alloy, or metallic composition which additionally contains titanium.

439	.. Titanium containing:

	This subclass is indented under subclass 436. Alloy, or metallic composition which contains titanium.

440	.. Iron containing:

	This subclass is indented under subclass 436. Alloy, or metallic composition which additionally contains iron.

441	NICKEL BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of nickel.

442	. Chromium containing:

This subclass is indented under subclass 441. Alloy, or metallic composition which additionally contains chromium.

(1) Note. This and indented subclasses contain many patents to so called "superalloys" which retain considerable strength at high temperatures and which are therefor particularly useful as components in gas turbine engines.

443	.. Rare earth, magnesium or alkaline earth metal containing:

	This subclass is indented under subclass 442. Alloy, or metallic composition which additionally contains at least one metal selected from scandium yttrium, lanthanium through lutetium (i.e., atomic numbers 57-71), magnesium, calcium, strontium, or barium.

444	.. Noble metal containing:

	This subclass is indented under subclass 442. Alloy, or metallic composition which additionally contains at least one of the metals ruthenium, rhodium, palladium, osmium, iridium, platinum, gold, or silver.

445	.. Aluminum containing:

	This subclass is indented under subclass 442. Alloy, or metallic composition which additionally contains aluminum.

446	... Titanium containing:

	This subclass is indented under subclass 445. Alloy, or metallic composition which additionally contains titanium.

447	.... Tantalum, niobium, vanadium or hafnium containing:

	This subclass is indented under subclass 446. Alloy which additionally contains at least one, or the metals tantalum, niobium, vanadium, or hafnium.

448	..... Molybdenum or tungsten containing:

	This subclass is indented under subclass 447. Alloy, or metallic composition which additionally contains at least one of the metals molybdenum, or tungsten.

449	.... Zirconium or boron containing:

	This subclass is indented under subclass 446. Alloy, or metallic composition which additionally contains at least one of the elements zirconium, or boron.

450	.... Molybdenum or tungsten containing:

	This subclass is indented under subclass 446. Alloy, or metallic composition additionally containing at least one of the metals molybdenum, or tungsten.

451	.. Titanium containing:

	This subclass is indented under subclass 442. Alloy, or metallic composition which additionally contains titanium.

452	.. Iron or manganese containing:

	This subclass is indented under subclass 442. Alloy, or metallic composition which additionally contains at least one of the metals iron, or manganese.

453	... Molybdenum or tungsten containing:

	This subclass is indented under subclass 452. Alloy, or metallic composition which additionally contains at least one of the metals molybdenum, or tungsten.

454	.... Cobalt containing:

	This subclass is indented under subclass 453. Alloy, or metallic composition which additionally contains cobalt.

455	. Rare earth containing:

	This subclass is indented under subclass 441. Alloy, or metallic composition which additionally contains at least one of the metals scandium, yttrium, or lanthanium through lutetum (i.e., atomic numbers 57 through 71).

456	. Noble metal containing:

	This subclass is indented under subclass 441. Alloy, or metallic composition which additionally contains at least one of the metals, ruthenium, rhodium, palladium, osmium, iridium, platinum, silver, or gold.

457	. Copper containing:

	This subclass is indented under subclass 441. Alloy, or metallic composition which additionally contains copper.

458	.. Iron containing:

	This subclass is indented under subclass 457. Alloy, or metallic composition which additionally contains iron.

459	. Iron or manganese containing:

	This subclass is indented under subclass 441. Alloy, or metallic composition which additionally contains at least one of the metals iron, or manganese.

460	. Aluminum containing:

	This subclass is indented under subclass 441. Alloy, or metallic composition which additionally contains aluminum.

461	OSMIUM OR IRIDIUM BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of osmium, or over 50 percent iridium by weight.

462	RUTHENIUM OR RHODIUM BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of ruthenium or over 50 percent of rhodium by weight.

463	PALLADIUM BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition containing over 50 percent of palladium by weight.

464	. Copper containing:

	This subclass is indented under subclass 463. Alloy, or metallic composition which additionally contains copper.

465	. Platinum containing:

	This subclass is indented under subclass 463. Alloy, or metallic composition which additionally contains platinum.

466	PLATINUM BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of platinum by weight.

467	. Rhodium containing:

	This subclass is indented under subclass 466. Alloy, or metallic composition which additionally contains rhodium.

468	. Nickel containing:

	This subclass is indented under subclass 466. Alloy, or metallic composition which additionally contains nickel.

469	COPPER BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of copper by weight.

470	. Tin containing:

	This subclass is indented under subclass 469. Alloy, or metallic composition which additionally contains tin.

471	.. Aluminum containing:

	This subclass is indented under subclass 470. Alloy, or metallic composition which additionally contains aluminum.

472	.. Phosphorus containing:

	This subclass is indented under subclass 470. Alloy, or metallic composition which additionally contains phosphorus.

473	.. Iron, manganese or nickel containing:

	This subclass is indented under subclass 470. Alloy, or metallic composition which additionally contains at least one of the metals iron, manganese, or nickel.

474	.. Lead containing:

	This subclass is indented under subclass 470. Alloy, or metallic composition which additionally contains lead.

475	... Zinc containing:

	This subclass is indented under subclass 474. Alloy, or metallic composition which additionally contains zinc.

476	.. Zinc containing:

	This subclass is indented under subclass 470. Alloy, or metallic composition which additionally contains zinc.

477	. Zinc containing:

	This subclass is indented under subclass 469. Alloy, or metallic composition which additionally contains zinc.

478	.. Aluminum containing:

	This subclass is indented under subclass 477. Alloy, or metallic composition which additionally contains aluminum.

479	... Nickel containing:

	This subclass is indented under subclass 478. Alloy, or metallic composition which additionally contains nickel.

480	... Manganese containing:

	This subclass is indented under subclass 478. Alloy, or metallic composition which additionally contains manganese.

481	.. Nickel containing:

	This subclass is indented under subclass 477. Alloy, or metallic composition which additionally contains nickel.

482	.. Manganese containing:

	This subclass is indented under subclass 477. Alloy, or metallic composition which additionally contains manganese.

483	.. Noble metal containing:

	This subclass is indented under subclass 477. Alloy, or metallic composition which additionally contains at least one of the metals ruthenium, rhodium, palladium, osmium, iridium, platinum, silver, or gold.

484	.. Refractory metal containing:

	This subclass is indented under subclass 477. Alloy, or metallic composition which additionally contains at least one of the metals titanium, vanadium, rhromium, zirconium, niobium, molybdenium, hafnium, tantalum, or tungsten.

485	. Nickel containing:

	This subclass is indented under subclass 469. Alloy, or metallic composition which additionally contains nickel.

486	.. Aluminum containing:

	This subclass is indented under subclass 485. Alloy, or metallic composition which additionally contains aluminum.

487	.. Iron or manganese containing:

	This subclass is indented under subclass 485. Alloy, or metallic composition which additionally contains at least one of the metals iron, or manganese.

488	.. Refractory metal containing:

	This subclass is indented under subclass 485. Alloy, or metallic composition which additionally contains at least one of the metals titanium, vanadium, chromium, zirconium, niobium, molybdenum, hafnium, tantalum, or tungsten.

489	. Aluminum, gallium, indium or thallium containing:

	This subclass is indented under subclass 469. Alloy, or metallic composition which additionally contains at least one of the metals aluminum, gallium, indium, or thallium.

490	. Silicon containing:

	This subclass is indented under subclass 469. Alloy, or metallic composition which additionally contains silicon.

491	. Lead containing:

	This subclass is indented under subclass 469. Alloy, or metallic composition which additionally contains lead.

492	. Titanium, zirconium or hafnium containing:

	This subclass is indented under subclass 469. Alloys, or metallic composition which additionally contains at least one of the metals titanium, zirconium, or hafnium.

493	. Manganese containing:

	This subclass is indented under subclass 469. Alloy, or metallic composition which additionally contains manganese.

494	. Beryllium, magnesium or alkaline earth metal containing:

	This subclass is indented under subclass 469. Alloy, or metallic composition which additionally contains at least one of the metals beryllium, magnesium, calcium, strontium, or barium.

495	. Other refractory metal containing:

	This subclass is indented under subclass 469. Alloy, or metallic composition which additionally contains at least one of the metals vanadium, chromium, niobium, molybdenum, tantalum, or tungsten.

496	. Iron or cobalt containing:

	This subclass is indented under subclass 469. Alloy, or metallic composition which additionally contains at least one of the metals iron, or cobalt.

497	. Noble metal containing:

	This subclass is indented under subclass 469. Alloy, or metallic composition additionally containing at least one of the metals ruthenium, rhodium, palladium, osmium, iridium, platinum, silver, or gold.

498	. Cadmium or mercury containing:

	This subclass is indented under subclass 469. Alloy, or metallic composition which additionally contains at least one of the metals cadmium, or mercury.

499	. Phosphorus, arsenic, antimony or bismuth containing:

	This subclass is indented under subclass 469. Alloy, or metallic composition which additionally contains at least one of the elements phosphorus, arsenic, antimony, or bismuth.

500	. Sulfur, selenium or tellurium containing:

	This subclass is indented under subclass 469. Alloy, or metallic composition which additionally contains at least one of the elements sulfur, selenium, or tellurium.

501	SILVER BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of silver by weight.

502	. Copper containing:

	This subclass is indented under subclass 501. Alloy, or metallic composition which additionally contains copper.

503	.. Other noble metal containing:

	This subclass is indented under subclass 502. Alloy, or metallic composition which additionally contains at least one of the metals ruthenium, rhodium, palladium, osmium, iridium, platinum, or gold.

504	.. Zinc or cadmium containing:

	This subclass is indented under subclass 502. Alloy, or metallic composition which additionally contains at least one of the metals zinc, or cadmium.

505	. Other noble metal containing:

	This subclass is indented under subclass 501. Alloy, or metallic composition which additionally contains at least one of the metals ruthenium, rhodium, palladium, osmium, iridium, platinum, or gold.

506	. Zinc or cadmium containing:

	This subclass is indented under subclass 501. Alloy which additionally contains at least one of the metals zinc, or cadmium.

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of gold by weight.

508	. Palladium containing:

	This subclass is indented under subclass 507. Alloy, or metallic composition which additionally contains palladium.

509	.. Platinum containing:

	This subclass is indented under subclass 508. Alloy, or metallic composition which additionally contains platinum.

510	. Platinum containing:

	This subclass is indented under subclass 507. Alloy, or metallic composition which additionally contains platinum.

511	. Silver containing:

	This subclass is indented under subclass 507. Alloy, or metallic composition which additionally contains silver.

512	. Iron, cobalt or nickel containing:

	This subclass is indented under subclass 507. Alloy, or metallic composition which additionally contains at least one of the metals iron, cobalt, or nickel.

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of zinc.

514	. Aluminum containing:

	This subclass is indented under subclass 513. Alloy, or metallic composition which additionally contains aluminum.

515	.. Copper containing:

	This subclass is indented under subclass 514. Alloy, or metallic composition which additionally contains copper.

516	... Magnesium containing:

	This subclass is indented under subclass 515. Alloy, or metallic composition which additionally contains magnesium.

517	... Tin containing:

	This subclass is indented under subclass 515. Alloy, or metallic composition which additionally contains tin.

518	... Manganese, iron, cobalt or nickel containing:

	This subclass is indented under subclass 515. Alloy, or metallic composition which additionally contains at least one of the metals manganese, iron, cobalt, or nickel.

519	.. Magnesium containing:

	This subclass is indented under subclass 514. Alloy, or metallic composition which additionally contains magnesium.

520	.. Manganese, iron, cobalt or nickel containing:

	This subclass is indented under subclass 514. Alloy, or metallic composition which additionally contains at least one of the metals manganese, iron, cobalt, or nickel.

521	. Copper containing:

	This subclass is indented under subclass 513. Alloy, or metallic composition which additionally contains copper.

522	.. Manganese, iron, cobalt or nickel containing:

	This subclass is indented under subclass 521. Alloy, or metallic composition which additionally contains at least one of the metals manganese, iron, cobalt, or nickel.

523	. Cadmium containing:

	This subclass is indented under subclass 513. Alloy, or metallic composition which additionally contains cadmium.

524	. Tin containing:

	This subclass is indented under subclass 513. Alloy, or metallic composition which additionally contains tin.

525	CADMIUM BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition containing over 50 percent of cadmium by weight.

526	MERCURY BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of mercury by weight.

527	. Silver containing:

	This subclass is indented under subclass 526. Alloy, or metallic composition which additionally contains silver.

528	ALUMINUM BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of aluminum by weight.

529	. Copper containing:

	This subclass is indented under subclass 528. Alloy, or metallic composition which additionally contains copper.

530	.. Tin containing:

	This subclass is indented under subclass 529. Alloy, or metallic composition which additionally contains tin.

531	.. Zinc containing:

	This subclass is indented under subclass 529. Alloy, or metallic composition which additionally contains zinc.

532	... Magnesium containing:

	This subclass is indented under subclass 531. Alloy, or metallic composition which additionally contains magnesium.

533	.. Magnesium containing:

	This subclass is indented under subclass 529. Alloy, or metallic composition which additionally contains magnesium.

534	... Silicon containing:

	This subclass is indented under subclass 533. Alloy, or metallic composition which additionally contains silicon.

535	.... Titanium, zirconium, hafnium, vanadium, niobium, or tantalum containing:

	This subclass is indented under subclass 534. Alloy, or metallic composition which additionally contains at least one of the metals titanium, zirconium, hafnium, vanadium, niobium, or tantalium.

536	.... Cadmium, lead or bismuth containing:

	This subclass is indented under subclass 534. Alloy, or metallic composition which additionally contains at least one of the metals cadmium, lead, or bismuth.

537	.. Silicon containing:

	This subclass is indented under subclass 529. Alloy, or metallic composition which additionally contains silicon.

538	.. Iron, cobalt or nickel containing:

	This subclass is indented under subclass 529. Alloy, or metallic composition which additionally contains at least one of the metals iron, cobalt, or nickel.

539	.. Silver containing:

	This subclass is indented under subclass 529. Alloy, or metallic composition which additionally contains silver.

540	. Zinc containing:

	This subclass is indented under subclass 528. Alloy, or metallic composition which additionally contains zinc.

541	.. Magnesium containing:

	This subclass is indented under subclass 540. Alloy, or metallic composition which additionally contains magnesium.

542	. Magnesium containing:

	This subclass is indented under subclass 528. Alloy, or metallic composition which additionally contains magnesium.

543	.. Titanium, zirconium, hafnium, vanadium, niobium or tantalum containing:

	This subclass is indented under subclass 542. Alloy, or metallic composition which additionally contains at least one of the metals titanium, zirconium, hafnium, vanadium, niobium, or tantalum.

544	... Silicon containing:

	This subclass is indented under subclass 543. Alloy, or metallic composition which additionally contains silicon.

545	... Chromium containing:

	This subclass is indented under subclass 543. Alloy, or metallic composition which additionally contains chromium.

546	.. Silicon containing:

	This subclass is indented under subclass 542. Alloy, or metallic composition which additionally contains silicon.

547	.. Iron, cobalt or nickel containing:

	This subclass is indented under subclass 542. Alloy, or metallic composition which contains at least one of the metals iron, cobalt, or nickel.

548	. Silicon containing:

	This subclass is indented under subclass 528. Alloys, or metallic composition which additionally contains silicon.

549	.. Alkali or alkaline earth metal containing:

	This subclass is indented under subclass 548. Alloy, or metallic composition which contains at least one of the metals lithium, sodium, potassium, rubium, cesium, calcium, barium, or strontium.

550	. Iron, cobalt or nickel containing:

	This subclass is indented under subclass 528. Alloy, or metallic composition which additionally contains at least one of the metals iron, cobalt, or nickel.

551	.. Titanium, zirconium, hafnium, vanadium, niobim, or tantalum containing:

	This subclass is indented under subclass 550. Alloy, or metallic composition which additionally contains at least one of the metals titanium, zirconium, hafnium, vanadium, niobium, or tantalum.

552	. Titanium, zirconium, hafnium, vanadium, niobium or tantalum containing:

	This subclass is indented under subclass 528. Alloy, or metallic composition which additionally contains at least one of the metals, titanium, zirconium, hafnium, vanadium, niobium, or tantalum.

553	.. Manganese containing:

	This subclass is indented under subclass 552. Alloy, or metallic composition which additionally contains manganese.

554	. Cadmium, lead or bismuth containing:

	This subclass is indented under subclass 528. Alloy, or metallic composition which additionally contains at least one of the metals cadmium, lead, or bismuth.

555	GALLIUM, INDIUM OR THALLIUM BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains either over 50 percent of gallium, over 50 percent of indium, or over 50 percent of thallium by weight.

556	GERMANIUM BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of germanium by weight.

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of tin by weight.

558	. Lead containing:

	This subclass is indented under subclass 557. Alloy, or metallic composition which additionally contains lead.

559	.. Antimony or bismuth containing:

	This subclass is indented under subclass 558. Alloy, or metallic composition which additionally contains at least one of the metals antimony, or bismuth.

560	. Copper containing:

	This subclass is indented under subclass 557. Alloy, or metallic composition which additionally contains copper.

561	.. Antimony or bismuth containing:

	This subclass is indented under subclass 560. Alloy, or metallic composition which additionally contains at least one of the metals antimony or bismuth.

562	. Antimony or bismuth containing:

	This subclass is indented under subclass 557. Alloy, or metallic composition which contains at least one of the metals antimony, or bismuth.

	This subclass is indented under the class definition. Alloy, or metallic composition containing over 50 percent of lead by weight.

564	. Alkali, alkaline earth metal or magnesium containing:

	This subclass is indented under subclass 563. Alloy, or metallic composition which additionally contains at least one of the metals, lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, or barium.

565	.. Tin containing:

	This subclass is indented under subclass 564. Alloy, or metallic composition which additionally contains tin.

566	. Silver containing:

	This subclass is indented under subclass 563. Alloy, or metallic composition which additionally contains silver.

567	. Arsenic containing:

	This subclass is indented under subclass 563. Alloy, or metallic composition which additionally contains arsenic.

568	.. Tin containing:

	This subclass is indented under subclass 567. Alloy, or metallic composition which additionally contains tin.

569	... Antimony containing:

	This subclass is indented under subclass 568. Alloy, or metallic composition which additionally contains antimony.

570	. Tin containing:

	This subclass is indented under subclass 563. Alloy, or metallic composition which additionally contains tin.

571	.. Antimony containing:

	This subclass is indented under subclass 570. Alloy, or metallic composition which additionally contains antimony.

572	. Antimony containing:

	This subclass is indented under subclass 563. Alloy, or metallic composition which additionally contains antimony.

573	. Copper containing:

	This subclass is indented under subclass 563. Alloys, or metallic composition which additionally contains copper.

574	. Zinc containing:

	This subclass is indented under subclass 563. Alloy, or metallic composition which additionally contains zinc.

575	. Cadmium containing:

	This subclass is indented under subclass 563. Alloy, or metallic composition which additionally contains cadmium.

576	ANTIMONY BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of antimony by weight.

577	BISMUTH BASE:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of bismuth by weight.

578	SILICON BASE ALLOY CONTAINING METAL:

This subclass is indented under the class definition. Alloy which is so named in the patent which contains over 50 percent of silicon by weight and which further contains at least one element which is a metal under the definition of this class.

(1) Note. This subclass contains, e.g., ferrosilicon containing over 50 percent silicon by weight, etc.

579	ARSENIC BASE OR SELENIUM OR TELLURIUM BASE ALLOY CONTAINING METAL:

This subclass is indented under the class definition. Alloy, or metallic composition containing over 50 percent arsenic by weight, or an alloy under the class definition which is so named in the patent, which contains over 50 percent selenium, or 50 percent tellurium by weight and which further contains at least one element which is a metal under the definition of this class.

SEE OR SEARCH CLASS:

430,	Radiation Imagery Chemistry: Process, Composition, or Product Thereoft, subclasses 85+ for a selenium base alloy claimed, or solely disclosed as having utility as an image forming medium in electrical photography, e.g., xerography.

580	CONTAINING OVER 50 PERCENT METAL BUT NO BASE METAL:

	This subclass is indented under the class definition. Alloy, or metallic composition which contains over 50 percent of total metal by weight but wherein each individual metal is present in an amount of not over 50 percent by weight.

581	. Iron containing:

	This subclass is indented under subclass 580. Alloy, or metallic composition which contains iron in an amount which does not exceed 50 percent by weight.

582	.. Copper containing:

	This subclass is indented under subclass 581. Alloy, or metallic composition which additionally contains copper.

583	.. Chromium containing:

	This subclass is indented under subclass 581. Alloy, or metallic composition which additionally contains chromium.

584.1

... Nickel containing:

	This subclass is indented under subclass 583. Alloy, or metallic composition which additionally contains nickel.

585	.... Cobalt containing:

	This subclass is indented under subclass 584. Alloy, or metallic composition which additionally contains cobalt.

586	..... Titanium or zirconium containing:

	This subclass is indented under subclass 585. Alloy, or metallic composition which additionally contains at least one of the metals titanium, or zirconium.

586.1

.... Molybdenum containing:

	This subclass is indented under subclass 584.1. Alloy, or metallic composition which additionally contains molybdenum.

587	. Copper containing:

	This subclass is indented under subclass 580. Alloy, or metallic composition containing copper in an amount which does not exceed 50 percent by weight.

588	. Chromium containing:

	This subclass is indented under subclass 580. Alloy, or metallic composition which contains chromium in an amount which does not exceed 50 percent by weight.

589	. Tin containing:

	This subclass is indented under subclass 580. Alloy, or metallic composition which contains tin in an amount which does not exceed 50 percent by weight.

This subclass is indented under the class definition. Processes of preparing alloys, or metallic compositions which are not claimed with sufficient particularity to be placed in any subclass above, e.g., no base metal is recited either individually, or as a particular group, e.g., refractory metals, etc.

(1) Note. This subclass is the collecting point for processes which are of general utility in preparing a wide variety of alloys. Processes which prepare a specific alloy are placed therewith and are cross referenced here only if disclosed as having general utility.

591	Miscellaneous:

This subclass is indented under the class definition. Alloys or metallic composition not provided for in any subclass above.

(1) Note. Specific subject matter found in this subclass includes e.g., alloys based on boron containing metal and alloys containing less than 50 percent of total metals, but at least some metal.

900	HYDROGEN STORAGE:

Cross-reference art collection of alloys, or metallic compositions which are capable of taking up and releasing hydrogen for purposes of storage of hydrogen.

(1) Note. This class takes alloys, metallic compositions which take up hydrogen for storage no matter what the mechanism. Often the patent states that metal hydride is formed, but this is not always clear. This class thus takes hydrogen storage alloys in preference to Class 252, subclass 184 and Class 502, subclasses 400+ whether, or not the storage is stated to be by chemical reaction, or sorbtion.

SEE OR SEARCH CLASS:

423,	Chemistry of Inorganic Compounds, subclasses 644+ for metal hydrides, or hydrided alloys whether stoichiometric or not, or for methods of hydrogen storage and release by chemical reaction, or sorbtion.

901	SUPERCONDUCTIVE:

Cross-reference art collection of alloys, or metallic compositions which exhibit the property of practically no resistance to the flow of electric current.

(1) Note. At this time (1981) this property has only been observed at very low temperatures of about 22° K, or below.

SEE OR SEARCH CLASS:

29,	Metal Working, subclass 599 for a method of making an electrical device which includes a superconductor.
174,	Electricity: Conductors and Insulators, subclasses 126.1+ for electrical conductor structure which includes a superconductor.
252,	Compositions, subclass 500 for electrically conductive compositions which may be superconductors.
335,	Electricity: Magnetically Operated Switches Magnets, and Electromagnets, subclass 216 for magnets or electromagnets of the superconductive type.
427,	Coating Processes, subclasses 62+ for processes of producing a superconductive electrical product by coating.
428,	Stock Material or Miscellaneous Articles, subclass 930 for metallic stock material which is superconductive.

902	SUPERPLASTIC:

Cross-reference art collection of alloys, or metallic compositions which exhibit property of being capable of great deformations of over 100 percent without "necking down", or rupturing.

(1) Note. In some cases the alloy must be heated to exhibit this property.

(2) Note. In most cases superplastic alloys are described as such in the patents found herein.

903	SEMICONDUCTIVE:

Cross-reference art collection alloys, or metallic composition whose resistivity at room temperature is in the range of 10^-2 to 10^-9 ohm-cm (which is between the range of metallic conductors and insulators).

(1) Note. These compositions are usually employed in barrier layer devices, e.g., transistors, etc.

SEE OR SEARCH CLASS:

252,	Compositions, subclass 62.3 for barrier layer device compositions which are not merely alloys, or metallic compositions.