Class 419: POWDER METALLURGY PROCESSES ( Manual of U.S. Patent Classification )

U.S. PATENT AND TRADEMARK OFFICE
Information Products Division

[Manual of Classification, Class Listing]

Manual of U.S. Patent Classification
as of June 30, 2000

Class
419
POWDER METALLURGY PROCESSES

Class definitions may be accessed by clicking on the class title, above.
Subclass definitions may be accessed by clicking on the subclass number, below.

Patents classified in a subclass may be accessed by clicking on the " [Patents]

" icon following the subclass number, below.

( please note that links to definitions and classified patents may not be available for some classes and subclasses )

For search strategies, please refer to the Classification Index Explanation of Data web page.

Simple Text Search Across All U.S. Patent Classes in the Manual of Classification (requires a JAVA-enabled web browser)

--------------------------------------------------------------

Subclass		Title
ClassTitle		===> POWDER METALLURGY PROCESSES

1		POWDER METALLURGY PROCESSES WITH HEATING OR SINTERING
2		. Making porous product
3		. Making articles of indefinite length
4		. . Filaments or fibers
5		. Making composite or hollow article
6		. . Powder next to powder
7		. . . One or more components not compacted
8		. . Powder next to solid
9		. . . Powder not compacted
10		. Metal and nonmetal in final product
11		. . Nonmetal is elemental carbon
12		. . Boride containing
13		. . Nitride containing
14		. . Carbide containing
15		. . . Complex or multiple carbides
16		. . . . With another binary nonmetal
17		. . . Single carbide
18		. . . . Tungsten carbide
19		. . Oxide containing
20		. . . Rare earth oxide
21		. . . Silver metal with metal oxide
22		. . . Copper oxide
23		. Powder shape or size characteristics
24		. . Filaments or fibers
25		. Controlled cooling after sintering
26		. Post sintering operation
27		. . Impregnation
28		. . Subsequent working
29		. . Subsequent heat treatment (e.g., annealing, etc.)
30		. Powder pretreatment (prior to consolidation or sintering)
31		. . Heat treatment of powder
32		. . Mechanical blending
33		. . Comminuting
34		. . Chemical blending
35		. . Coating
36		. . Addition of fugitive material
37		. . . Additional material is solid
38		. Consolidation of powder prior to sintering
39		. . Specific pressure or lack or pressure recited
40		. . . Slip or slurry
41		. . Extruding
42		. . Isostatic or Hydrostatic
43		. . Rolling
44		. Pretreatment of consolidated powders
45		. Sintering which includes a chemical reaction
46		. Alloying occurs during sintering
47		. Liquid phase sintering
48		. Heat and pressure simultaneously to effect sintering
49		. . Hot isostatic pressing (HIP)
50		. . Hot rolling
51		. . Multiaxial (Not HIP)
52		. . Heating by electrical means other than radiant energy
53		. Plural heating steps including sintering
54		. . Different temperatures
55		. . Additional operation between heating steps
56		. Special medium during sintering
57		. . Special atmosphere
58		. . . Hydrogen or hydrogen plus nitrogen (Nitrogen per se in 57)
59		. . . Hydrocarbon or derivative (e.g., CH4, etc.)
60		. . . Vacuum
61		FORMING ARTICLES BY UNITING RANDOMLY ASSOCIATED METAL PARTICLES
62		. Powder pretreatment
63		. . Includes a chemical reaction
64		. . Includes coating of particles
65		. . Includes adding a binder material
66		. Consolidation of powders
67		. . Extrusion
68		. . Isostatic/Hydrostatic pressing
69		. . Rolling

Information Products Division -- Contacts

Questions regarding this report should be directed to:

U.S. Patent and Trademark Office
Information Products Division
PK3- Suite 441
Washington, DC 20231
tel: (703) 306-2600
FAX: (703) 306-2737
email: oeip@uspto.gov

Last Modified: 6 October 2000

Manual of U.S. Patent Classification as of June 30, 2000

Class 419 POWDER METALLURGY PROCESSES

Manual of U.S. Patent Classification
as of June 30, 2000

Class
419
POWDER METALLURGY PROCESSES