Class 122: LIQUID HEATERS AND VAPORIZERS ( Manual of U.S. Patent Classification )

U.S. PATENT AND TRADEMARK OFFICE
Information Products Division
[Manual of Classification, Class Listing] [Classification Index] [USPTO Home Page]

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


Class
122
LIQUID HEATERS AND VAPORIZERS


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Subclass Title
ClassTitle ===> LIQUID HEATERS AND VAPORIZERS
1R[Patents]PLANTS
2[Patents] . Garbage
3[Patents] . Motor vehicle
1A[Patents] . Air heaters
1B[Patents] . Once through
1C[Patents] . Feed water heaters
4R[Patents]MISCELLANEOUS
4A[Patents] . Electric boiler
4C[Patents] . Water-cooled stoker
4D[Patents] . Catalyst
5[Patents]GAS-PRODUCER
5.51[Patents]AIR-INJECTED
5.52[Patents] . Combustion gas and vapor contact
6R[Patents]INDUSTRIAL
6.5[Patents] . Port
6.6[Patents] . Tuyeres
6.7[Patents] . . Forge
7R[Patents] . Waste heat
7A[Patents] . . Steel converter
7B[Patents] . . Additional burner
7C[Patents] . . Waste sulfite
7D[Patents] . . Carbon monoxide
8[Patents] . Water firebox
9[Patents] . . Water tube type
6A[Patents] . Water-cooled walls
6B[Patents] . Bosh plates
6C[Patents] . Skew arch coolers
10[Patents]FOR FLUID FUEL BURNER
11[Patents]ROTARY
12[Patents]ROTATABLY SUPPORTED
13.01[Patents]STAND BOILER (E.G., WATER HEATER, ETC.)
13.3[Patents] . And delivery means to dispensing feature
14.1[Patents] . And condition responsive feature
14.2[Patents] . . Controls burner
14.21[Patents] . . . By other than temperature of water
14.22[Patents] . . . By temperature of water in a water containing chamber or external tank
14.3[Patents] . . Having water flow control feature
14.31[Patents] . . . Using valve actuated by flow or pressure (e.g., check valve, etc.)
15.1[Patents] . Heated by liquid or steam (e.g., indirect heating, etc.)
16.1[Patents] . Solid fuel burner
17.1[Patents] . Fluid fuel burner
17.2[Patents] . . Liquid fuel burner
18.1[Patents] . . Having heat exchange feature
18.2[Patents] . . . Preheater
18.3[Patents] . . . Fire tube or flue surrounded by water containing chamber
18.31[Patents] . . . . Penetrates one side of water chamber to another
18.4[Patents] . . . Water tube surrounded by burned fuel
18.5[Patents] . . And external water tank
19.1[Patents] . Water containing chamber or external tank having circulation feature within
19.2[Patents] . And casing feature for stand boiler or external water tank therefor
20R[Patents]SUBSIDIARY
20A[Patents] . Subsidiary-heater firebox
20B[Patents] . Subsidiary-heater offtake flue
29[Patents]ANNULAR FIREBOX
30[Patents]MAGAZINE
INDIRECTLY HEATED
. Separate fluid
32[Patents] . . Surface
33[Patents] . . . Furnace
34[Patents] . . . Separator
31.1[Patents]INDIRECTLY HEATED SEPARATE INJECTED FLUID
31.2[Patents] . Submerged flame
35[Patents]ACCUMULATOR
36[Patents]AUXILIARY STEAM HEATER
37[Patents]COMPARTMENT
. Auxiliary
38[Patents] . . Draft regulator
39[Patents]FILM
40[Patents]FLASHER
41[Patents] . Fluid fuel
42[Patents]FIRE AND WATER TUBE
43[Patents] . Fluid fuel
44.1[Patents]FIRE TUBE
44.2[Patents] . With baffle in flue
49[Patents] . Horizontal and vertical
. Horizontal or inclined
. . Water firebox
50[Patents] . . . Flue
51[Patents] . Horizontal
52[Patents] . . Plural
53[Patents] . . . Water tube
. . Central firebox
54[Patents] . . . Double outlet
55[Patents] . . Cylinder
. . Depending fire tube
56[Patents] . . . Rear of bridge wall
. . Double water firebox
57[Patents] . . . Alternate smoke return
58R[Patents] . . Drop water firebox
59[Patents] . . . Circulation conduit
. . . Double
60[Patents] . . . . Alternate smoke return
61[Patents] . . . Drop water baffle
62[Patents] . . . Front and rear water baffle
63[Patents] . . . Front water baffle
64[Patents] . . . Interposed combustion chamber
65[Patents] . . . Rear water baffle
66[Patents] . . . Water coking chamber
. . . Water grate
67[Patents] . . . . Intermediate draft
68[Patents] . . . Water tube
. . . . Feed heater
69[Patents] . . . . . Check-valved
70[Patents] . . . . Feeding air
71[Patents] . . . . Solid baffle
58FB[Patents] . . . Fire box construction
72[Patents] . . Projecting into firebox
73[Patents] . . . Drop water firebox
. . Return and reverse
74[Patents] . . . Drop water firebox
75[Patents] . . Return fire tube
76[Patents] . . . Drop water firebox
77[Patents] . . . . Internal water tube
. . . Water firebox
78[Patents] . . . . Flue
79[Patents] . . Subjacent water arch
80[Patents] . . Subjacent flue
81[Patents] . . Subjacent transverse fire tube
. . Superjacent feed heater
82[Patents] . . . In communication
83[Patents] . . Transverse diaphragm
. . Two diameters
84[Patents] . . . Great diameter over firebox
85[Patents] . . . Small diameter over firebox
86[Patents] . . . . Water firebox
87[Patents] . . U-coupling
88[Patents] . . Upper drum
. . Water arch
89[Patents] . . . Rear of fire tube
90[Patents] . . Water firebox
. . . Firebox water heater
91[Patents] . . . . Trapped circuit
92[Patents] . . . Magazine
93[Patents] . . . Offset
94.1[Patents] . . . . Water tube type
95.1[Patents] . . . Plural with common combustion chamber
95.2[Patents] . . . . Multiboilers
96[Patents] . . . Superposed
. . . Water grate
97[Patents] . . . . Downdraft
98[Patents] . . . . Updraft
. . . Water tube
99[Patents] . . . . Straddle
. . . Water tube type
100[Patents] . . . . Interposed flue
101[Patents] . . Water smoke box
. . Water tube
. . . Horizontal
102[Patents] . . . . Over bridge wall
103[Patents] . . . Rear of fire tube
. . . Rearwardly declined
104[Patents] . . . . Over bridge wall
. . . Rearwardly inclined
105[Patents] . . . . Over bridge wall
106[Patents] . . Water wall
107[Patents] . . . Drop water firebox
108[Patents] . . . Subjacent water tube
109[Patents] . Inclined
. Transverse
110[Patents] . . Horizontal boiler
111[Patents] . . Vertical boiler
112[Patents] . . . Water firebox
113[Patents] . . Water tube
114[Patents] . Vertical
116[Patents] . . Central fire dome
117[Patents] . . Central magazine
. . Circulation tube
118[Patents] . . . Internal
119[Patents] . . Cylinder
120[Patents] . . Offset firebox
121[Patents] . . Return fire tube
122[Patents] . . . Water firebox
123[Patents] . . Separate compartment
124[Patents] . . Side magazine
125[Patents] . . Top water chamber
126[Patents] . . Water firebox
127[Patents] . . . Annular
128[Patents] . . . Central magazine
. . Water grate
129[Patents] . . . Downdraft
130[Patents] . . Water tube
131[Patents] . . . Internal
132[Patents] . . . Radial loop
133[Patents] . . . Spur
115[Patents] . . Fluid fuel
134[Patents] . Volute
46[Patents] . Magazine
. Flue
47[Patents] . . Horizontal
48[Patents] . . Vertical
45[Patents] . Fluid fuel
135.1[Patents]FLUE
135.2[Patents] . Alternative stack
135.3[Patents] . Sinusoidal flue
136R[Patents] . Horizontal
137[Patents] . . Plural
138[Patents] . . . Water tube
139[Patents] . . Drop water firebox
140.1[Patents] . . Internal water tube
140.2[Patents] . . . Having water tube in flue
. . . Longitudinal
141[Patents] . . . . Drop water firebox
142[Patents] . . . Return fire tube
143[Patents] . . . Spur
144[Patents] . . . Subjacent firebox
145[Patents] . . . Transverse
146[Patents] . . . . Drop water firebox
147[Patents] . . . . Return fire tube
148[Patents] . . . Water firebox
149[Patents] . . Return fire tube
150[Patents] . . . Rear water tube
. . . Water smoke box
151[Patents] . . . . Separate
152[Patents] . . Water grate in flue
153[Patents] . . Water tube
154[Patents] . . . Over bridge wall
136C[Patents] . . Horizontal-corrugated or finned
155.1[Patents] . Vertical
155.2[Patents] . . With flue baffle
155.3[Patents] . . Having exterior heating flue
155.4[Patents] . . Having corrugated flue
155.5[Patents] . . Having undulating flue
157[Patents] . . Central magazine
158[Patents] . . . Water jacket
. . Circulation tube
159[Patents] . . . Internal
160[Patents] . . Concentric shell
161[Patents] . . . Fluid fuel
162[Patents] . . . Central magazine
163[Patents] . . Exterior drum
165[Patents] . . Internal water heater
166.1[Patents] . . With internal water tube
166.2[Patents] . . . Loop-type tube
168[Patents] . . . Central magazine
169[Patents] . . . Coil
170[Patents] . . . . Header
171[Patents] . . . Contracted inlet
172[Patents] . . . Header
173[Patents] . . . Horizontal spur
174[Patents] . . . Internal fire tube
175[Patents] . . . Offset water firebox
176[Patents] . . . Transverse
177[Patents] . . . . Fluid fuel
178[Patents] . . . Vertical aligned fire tube
179[Patents] . . . . Fluid fuel
180[Patents] . . . . Spur water tube
181[Patents] . . . Vertical spur
167[Patents] . . . Fluid fuel
182.1[Patents] . . With return fire tube
182.2[Patents] . . . Having symmetrical arrangement of tubes
182.3[Patents] . . . Having tubes offset from firebox
. . Spiral water conduit
183[Patents] . . . Fluid fuel
. . Standpipe
. . . Water tube
184[Patents] . . . . Annular firebox
185[Patents] . . . . Loop
186[Patents] . . . . Spur
187[Patents] . . Transverse fire tube
164[Patents] . . Insulated outlet flue
156[Patents] . . Fluid fuel
HORIZONTAL CYLINDER
188[Patents] . Drop water baffle
. Offset subjacent firebox
189[Patents] . . Water roof
190[Patents] . . Water tube
. Subjacent fire tube
191[Patents] . . Beyond bridge wall
192[Patents] . Water bridge wall
193[Patents] . Water firebox
194[Patents] . . Water tube type
195[Patents] . Water tube
. . Feed heater
196[Patents] . . . Check-valved
197[Patents] . . Lateral-longitudinal
198[Patents] . . Lateral-vertical
199[Patents] . . . Firebox
200[Patents] . . Over fuel grate
201[Patents] . . Subjacent internal fire tube
202[Patents] . . Trapped circuit
. . Water grate
203[Patents] . . . Downdraft
204[Patents] . . . Intermediate draft
205[Patents] . . . Multiple series
206[Patents] . . . Solid and water bar
207[Patents] . . . Updraft
PLATE
. Zigzag conduit
208[Patents] . . Fluid fuel
209.1[Patents]SECTIONAL
209.2[Patents] . Feeding air
213[Patents] . Plural firebox
. Horizontal sections
214[Patents] . . Superimposed
215[Patents] . . . Central connection
216[Patents] . . . . Fluid fuel
217[Patents] . . . . Water firebox
218[Patents] . . . Water firebox
219[Patents] . . . . Central magazine
. . . Water tube
. . . . Internal fire tube
220[Patents] . . . . . Water firebox
. Vertical sections
221[Patents] . . Annularly positioned
222[Patents] . . . Central magazine
223[Patents] . . Longitudinally positioned
224[Patents] . . . Casing
225R[Patents] . . Transversely positioned
226[Patents] . . . Casing
227[Patents] . . . . Divided section
228[Patents] . . . Divided section
229[Patents] . . . Water grate
225A[Patents] . . . Water heater in flue
225B[Patents] . . . Water heater in boiler
225F[Patents] . . . Feeding air
230[Patents] . . Two-section
212.1[Patents] . With magazine
212.2[Patents] . . With return or alternate flue
211[Patents] . Fluid or solid fuel
210[Patents] . Fluid fuel
232[Patents] . Water grate
231[Patents] . Accessories
TANK
233[Patents] . Horizontal
234[Patents] . Vertical
235.11[Patents]WATER TUBE
235.12[Patents] . Wall structure
235.13[Patents] . With fuel burners having posts and tuyeres
235.14[Patents] . Tube structure
235.15[Patents] . Headers and connections
235.16[Patents] . For plural fluids
235.17[Patents] . Having baffles
235.18[Patents] . Having seals
235.19[Patents] . D-type tube
235.21[Patents] . . Multiple D-type tubes
235.22[Patents] . Wall loop
235.23[Patents] . Having specific tube patterns
235.24[Patents] . Screens
235.25[Patents] . . Floor screens
235.26[Patents] . Having slag and ash disposal
235.27[Patents] . Locomotive-type
235.28[Patents] . Having rotary flame
235.29[Patents] . Having forced circulation system
235.31[Patents] . Having specific intenal drum and head structure
235.32[Patents] . With combustion
235.33[Patents] . With convection zone regulation
235.34[Patents] . With parallel multiple fireboxes
235.35[Patents] . With serial multiple fireboxes
238[Patents] . Offset firebox
239[Patents] . Superimposed firebox
240.1[Patents] . Having plural fireboxes
240.2[Patents] . . Series connected
240.3[Patents] . . Parallel connected
241[Patents] . Firebox in drum
242[Patents] . Capillary
243[Patents] . . Fluid fuel
. Coil or loop
244[Patents] . . Central standpipe
245[Patents] . . . Fluid fuel
246[Patents] . . . Annular firebox
247[Patents] . Coil
. . Horizontal
248[Patents] . . . Fluid fuel
249[Patents] . . Vertical
250R[Patents] . . . Fluid fuel
250S[Patents] . . . . Standpipe
251[Patents] . . . Central magazine
252[Patents] . . . Water firebox
253[Patents] . Cross
254[Patents] . . Over bridge wall
. . Over firebox
. . . Longitudinal
. . . . Header
255[Patents] . . . . . Drum
. . . Transverse
. . . . Header
256[Patents] . . . . . Drum
. . Transverse
. . . Header
257[Patents] . . . . Drum
258[Patents] . Downflow
259[Patents] . Drum type
260[Patents] . Flat
261[Patents] . . Volute
262[Patents] . Horizontal
263[Patents] . . Over bridge wall
264[Patents] . . Over firebox
265[Patents] . Inclined
266[Patents] . Internal fire tube
267[Patents] . . Horizontal
268[Patents] . . Inclined
269[Patents] . . Plural fire tube
270[Patents] . . Straddle
271[Patents] . . Vertical
272[Patents] . . . Central magazine
273[Patents] . Longitudinal upper drum
274[Patents] . . Fluid fuel
275[Patents] . Loop
276[Patents] . . Firebox enclosing
277[Patents] . . Over bridge wall
. . Over firebox
278[Patents] . . . Cross
279[Patents] . . . Horizontal
. . . Rear of bridge wall
280[Patents] . . . . Bridge wall header
281[Patents] . . . Standpipe
282[Patents] . . . Vertical
283[Patents] . . . . Fluid fuel
. Over bridge wall
284[Patents] . . Headers at right angles
285[Patents] . . Transverse water baffle
. . Water grate
286[Patents] . . . Downdraft
287[Patents] . . . Intermediate draft
. Over firebox
288[Patents] . . Headers at right angles
. . Water grate
289[Patents] . . . Updraft
. Rearwardly declined
. . Over bridge wall
290[Patents] . . . Front and rear header
291[Patents] . . . . Horizontal-longitudinal drum
292[Patents] . . . . . Firebox tube
293[Patents] . . . . . Longitudinal water baffle
294[Patents] . . . . . Water wall
295[Patents] . . . . Internal water tube
296[Patents] . . . . Longitudinal-declined drum
297[Patents] . . . . Transverse drum
. . Over firebox
. . . Front and rear header
298[Patents] . . . . Horizontal-longitudinal drum
299[Patents] . . . . Transverse drum
300[Patents] . . . . Tubes beyond side wall
. . Plural upper transverse drum
301[Patents] . . . Plural lower transverse drum
302[Patents] . . . Single lower transverse drum
. Rearwardly inclined
. . Over firebox
. . . Front and rear header
303[Patents] . . . . Transverse drum
. Separate banks
304[Patents] . . Opposite fireboxes
305[Patents] . Spur
306[Patents] . . Bridge wall header
307[Patents] . . Central standpipe
308[Patents] . . . Fluid fuel
309[Patents] . . . Annular firebox
310[Patents] . . . Central magazine
311[Patents] . . Cross
312[Patents] . . Horizontal-longitudinal drum
313[Patents] . . Over bridge wall
. . Over firebox
314[Patents] . . . Central header
315[Patents] . . . Declined
316[Patents] . . . Horizontal
317[Patents] . . Straddle
318[Patents] . . Vertical
319[Patents] . . . Fluid fuel
320[Patents] . . . Central magazine
321[Patents] . Standpipe
322[Patents] . . Fluid fuel
323[Patents] . . Annular firebox
324[Patents] . Straddle
. . Plural upper drum
325[Patents] . . . Plural lower drum
326[Patents] . . . . Cross
. . Single upper drum
327[Patents] . . . Plural lower drum
328[Patents] . . . . Fluid fuel
329[Patents] . . . . Cross
330[Patents] . . . . Plural firebox
331[Patents] . Transverse horizontal drum
332[Patents] . Vertical
333[Patents] . . Fluid fuel
334[Patents] . . Side magazine
335[Patents] . . Annular firebox
336[Patents] . . Offset firebox
337[Patents] . . . Elevated
. . Annular lower drum
338[Patents] . . . Annular upper drum
339[Patents] . . . . Central magazine
340[Patents] . . . . Tubes over firebox
341[Patents] . . . Fire tube upper drum
342[Patents] . . . Spur tube upper drum
343[Patents] . . . Upper drum
344[Patents] . . . . Central magazine
345[Patents] . . Beyond bridge wall
346[Patents] . . . Gas return
. . . Longitudinal upper drum
347[Patents] . . . . Longitudinal lower drum
. . Internal fire tube
348[Patents] . . . Fluid fuel
349[Patents] . . Over firebox
350[Patents] . . . Gas return
. . Plural upper longitudinal drum
351[Patents] . . . Plural lower longitudinal drum
. . Plural upper transverse drum
. . . Plural lower transverse drum
352[Patents] . . . . Offset firebox
353[Patents] . Water grate
354[Patents] . . Downdraft
355[Patents] . Zigzag
356[Patents] . . Fluid fuel
. . Over bridge wall
357[Patents] . . . Longitudinal drum
358[Patents] . . . Transverse drum
359[Patents] . . Over firebox
237[Patents] . Magazine
236[Patents] . Fluid fuel
. Headers
360[Patents] . . Closures and couplings
361[Patents] . . . Cleaning
362[Patents] . . . Concentric tube
363[Patents] . . . Drum
364[Patents] . . . Tube closures
365[Patents] . Drums and couplings
366[Patents]WICK
367.1[Patents]HEAT TRANSMITTER
367.2[Patents] . Double immersed heat transmitters
367.3[Patents] . Corrugated and finned heat transmitters
367.4[Patents] . Pebble furnaces
368[Patents]WATER FIREBOX
369[Patents] . Mud ring
370[Patents] . Plural
371[Patents]WATER GRATE
. Plural firebox
. . Superimposed
. . . Water grate
372[Patents] . . . . Updraft
373[Patents] . Cage
374[Patents] . Grate structure
375[Patents] . . Solid and water bar
376[Patents] . Progressive feed
. Water firebox
. . Solid and water bar
377[Patents] . . . Updraft
378[Patents] . . Updraft
21[Patents]CHEMICAL
22[Patents]FLUID AND SOLID FUEL
23[Patents]FLUID FUEL
24[Patents] . Explosion
. Plural burner
25[Patents] . . Superimposed
26[Patents]FRICTION GENERATOR
NONCOMBUSTIBLE HEATER
27[Patents] . Surface
28[Patents] . Water in contact
379[Patents]CLEANING
380[Patents] . Agitating circulator
. Blow off
381[Patents] . . Bottom and surface
382[Patents] . . Bottom
383[Patents] . . . Internal conduit
384[Patents] . . . . Ejector
385[Patents] . . . . Mud ring
386[Patents] . . . . Pan
387[Patents] . . . . Scraper
388[Patents] . . . . Valved
389[Patents] . . Surface exit
390[Patents] . Fluid jet
391[Patents] . . Horizontal fire tube boiler
392[Patents] . . Water tube boiler
393[Patents] . Mud drum
394[Patents] . Pans
395[Patents] . Sandblast
396[Patents] . Systems
397[Patents] . Trapped circuit
398[Patents] . . Feeding water
399[Patents] . . Surface and bottom exit
400[Patents] . . Surface exit
401[Patents] . . . Chemical feeder
402[Patents] . . . Circulating pump
403[Patents] . . . Feed heater
404[Patents] . . . Steam injector
405[Patents] . Wash-out nozzle
406.1[Patents]CIRCULATION
406.2[Patents] . Having anticavitation devices
406.3[Patents] . Having restrictors and orifices
406.4[Patents] . Once through
406.5[Patents] . With start-up operations
407[Patents] . Injector
408.1[Patents] . Having internal conduit
408.2[Patents] . . With internal geyser tube
409[Patents] . . Horizontal flue boiler
410[Patents] . . . Return fire tube
. Mechanical
411[Patents] . . Internal
412[Patents]FEED HEATERS
413[Patents] . Ash pan
. Boiler circuit
414[Patents] . . Feed-injected
. Circulatioon
. . Surface exit
. . . Mechanical pump
415[Patents] . . . . Feed-injected
417[Patents] . Drip plate in boiler
. Fire-engine boiler
. . Auxiliary
418[Patents] . . . Attached
419[Patents] . . . Detachable
420[Patents] . Furnace gases
421[Patents] . Offtake flue
422[Patents] . Furnace gases and steam
. Horizontal fire tube boiler
423[Patents] . . Smoke box
424[Patents] . . . Exhaust pipe
425[Patents] . . . Furnace gases and steam
426[Patents] . . . Water tube
427[Patents] . . Smoke chamber
428[Patents] . Internal conduit
429[Patents] . . Automatic sediment valve
430[Patents] . . Blow-off delivery
431[Patents] . . Filter in boiler
432[Patents] . . Furnace gases
433[Patents] . . Trap outside boiler
434[Patents] . Locomotive tender
435[Patents] . Pan in steam space
436[Patents] . . Spray
437[Patents] . Safety valve
438[Patents] . Spray to steam space
439[Patents] . Stack
441[Patents] . Steam
442[Patents] . . Injected
. . . Superposed
443[Patents] . . . . Open to steam space
444[Patents] . Water tube boiler
REGULATION
. Fuel and water
446[Patents] . . Fluid fuel
447[Patents] . . . Cutoff
. . Automatic control
449[Patents] . . . Solid fuel
450[Patents] . Suspended boiler
448.1[Patents]AUTOMATIC CONTROL OF FLUID FUEL AND WATER
448.2[Patents] . Having fuel or feed bypass
448.3[Patents] . Multiple boiler regulation
448.4[Patents] . Once through
451R[Patents]FEEDERS
. Automatic
451.1[Patents] . . Thermally controlled
451.2[Patents] . . . Pressure-operated valve
452[Patents] . Boiler pressure
. Gravity
456[Patents] . . Automatic
457[Patents] . . . Heater
458[Patents] . . Heater
451S[Patents] . Once through
459[Patents]STEAM TREATMENT
460[Patents] . Boilers with superheaters
. Fire tube boiler
. . Horizontal
461[Patents] . . . Superheater
. . . . In fire tube
462[Patents] . . . . . From smoke box
. . . . Interior steam space
463[Patents] . . . . . Internal fire tube
. . . . Smoke box
464[Patents] . . . . . Fire tube
465[Patents] . . . . . Steam tube
466[Patents] . . Superheater and feed heater
. . Vertical
467[Patents] . . . Superheater
. Flue boiler
. . Vertical
. . . Internal water tube
468[Patents] . . . . Superheater
. Horizontal boiler
. . Superheater
469[Patents] . . . Rear of firebox
470[Patents] . . . Waste-heat flue
. Water tube boiler
. . Declined over bridge wall
. . . Front and rear header
. . . . Declined drum
471[Patents] . . . . . Superheater
. . . . Longitudinal drum
472[Patents] . . . . . Superheater
. . Longitudinal drum
473[Patents] . . . Superheater
. . Over bridge wall
474[Patents] . . . Superheater
. . Standpipe
. . . Spur tube
475[Patents] . . . . Superheater
. . Transverse drum
478[Patents] . . . Superheater
477[Patents] . . Superheater and feed heater
476[Patents] . . Superheater
. Superheater
480[Patents] . . Damper-controlled
481[Patents] . . Firebox
482[Patents] . . Fire tube in steam space
483[Patents] . . Indirectly heated
484[Patents] . . Separate charges
485[Patents] . . Separate furnace
486[Patents] . . Steam dome
487[Patents] . . Water-injected
479.1[Patents] . Automatic heat regulation of superheater
479.2[Patents] . . Having gas recirculation
479.3[Patents] . . Having flame positioning
479.4[Patents] . . With variable firing
479.5[Patents] . . Having dampers
479.6[Patents] . . Plural furnaces
479.7[Patents] . . Once through
SEPARATORS
488[Patents] . Boiler circulation
489[Patents] . Boiler return
490[Patents] . For tilting boilers
491[Patents] . Interior of boilers
492[Patents] . Steam dome
493[Patents]BRACES AND STAYS
494[Patents]CASINGS
495[Patents]CROWN SHEETS PROTECTING
496[Patents]CROWN SHEETS AND STAYS
497[Patents]FRONTS
498[Patents] . Doors
499[Patents] . Mouths
500[Patents] . . Water firebox
501[Patents]FLUID-DISPLACER
502[Patents] . Fluid fuel
503[Patents]FUEL BAFFLES
504[Patents]SAFETY DEVICES
504.1[Patents] . Fusible control
504.2[Patents] . Alarms or indicators
. Fire extinguishers
504.3[Patents] . . Fusible control
505[Patents] . . Float-controlled
506[Patents] . . Pressure-controlled
507[Patents] . Self-closing valve
508[Patents]STEAM DOMES
509[Patents]SUBMERGED STEAM CHAMBER
510[Patents]SUPPORTS
511[Patents]TUBES AND CONNECTIONS
512[Patents]TUBE SHEETS
*********************************
FOREIGN ART COLLECTIONS
*********************************
Any foreign patents/nonpatent literature from subclasses that were reclassified have been transferred directly to the art collections listed below. These art collections contain ONLY foreign patents/nonpatent literature. [Note: The parenthetical references in the titles refer to the abolished U.S. classifications from which these art collections were derived].
FOR 100STAND BOILER (122/13.1)
FOR 101 . Electric (122/13.2)
. Fire tube and water tube (122/unnumbered)
FOR 102 . . Fluid fuel (122/16)
. Fire tube (122/unnumbered)
FOR 103 . . Fluid fuel (122/17)
. Water tube (122/unnumbered)
. . Below boiler (122/unumbered)
FOR 104 . . . Fluid fuel (122/18)
. . Casing (122/unnumbered)
FOR 105 . . . Fluid fuel (122/19)
FOR 106 . Fluid fuel (122/14)
FOR 107 . Solid fuel (122/15)
******************************
DIGESTS
******************************
DIG 1[Patents]Air heater
DIG 2[Patents]Air heater - indirectly heated
DIG 3[Patents]Gas flow baffles
DIG 4[Patents]Once through boilers
DIG 5[Patents]Critical pressure
DIG 6[Patents]Damper-directed radiation
DIG 7[Patents]Feeding air
DIG 10[Patents]Portable units
DIG 11[Patents]Removable steam-heating elements
DIG 13[Patents]Tubes - composition and protection
DIG 14[Patents]Tube replacement
DIG 15[Patents]Valves
DIG 16[Patents]Welding


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Questions regarding this report should be directed to:

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Last Modified: 6 October 2000