US Patent Class 48
GAS: HEATING AND ILLUMINATING



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Current as of: June, 1999
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  DF  CLASS NOTES
*  DD  ACETYLENE
1  DF  .~ Generation and liquefaction
2  DF  .~ Generator and holder
3 R  DF  .~ Generator and mixer
3 A  DF  .~.~ Special features
*  DD  .~ Generators
4  DF  .~.~ Water feed
5  DF  .~.~.~ Holder operated
6  DF  .~.~.~.~ Series
7  DF  .~.~.~.~.~ Automatic switch
8  DF  .~.~.~.~ Cell series
9  DF  .~.~.~.~ Gasometer and high-pressure holder
10  DF  .~.~.~.~ Interior valve
11  DF  .~.~.~.~ Rotary cylinder
12  DF  .~.~.~.~ Underfeed
13  DF  .~.~.~.~ Valveless
14  DF  .~.~.~.~.~ Displacer
15  DF  .~.~.~.~.~ Flexible tube
16  DF  .~.~.~.~.~ Generator supported
17  DF  .~.~.~.~.~ Siphon
18  DF  .~.~.~.~.~ Tilting
19  DF  .~.~.~ Ebb and flow
20  DF  .~.~.~.~ Series
21  DF  .~.~.~.~ Cell series
22  DF  .~.~.~.~ Concentric
23  DF  .~.~.~ Series
24  DF  .~.~.~ Cell series
25  DF  .~.~.~ Capillary
26  DF  .~.~.~.~ Adjustable
27  DF  .~.~.~ Percolating
28  DF  .~.~.~.~ Pressure valves
29  DF  .~.~.~ Expansible carbide container
30  DF  .~.~.~ Expansible water holder
31  DF  .~.~.~ Inexpansible gas holder and water feed
32 R  DF  .~.~.~ Oscillating
32 A  DF  .~.~.~.~ Floating generator or carbide container
32 B  DF  .~.~.~.~ With inversion to contact carbide
33  DF  .~.~.~ Rotary cylinder
34  DF  .~.~.~ Rotary grate
35  DF  .~.~.~ Underfeed
36  DF  .~.~.~ Interlocking devices
37  DF  .~.~.~ Pressure valves
38  DF  .~.~ Carbide feed
39  DF  .~.~.~ Apron or belt
40  DF  .~.~.~ Cock
41  DF  .~.~.~ Dip
42  DF  .~.~.~.~ Cell series
43  DF  .~.~.~ Flap valve
44  DF  .~.~.~ Hand
45  DF  .~.~.~.~ Dip
46  DF  .~.~.~ Measured charges
47  DF  .~.~.~.~ Cartridges
48  DF  .~.~.~.~ Rotary carrier
49  DF  .~.~.~.~.~ Vertical
50  DF  .~.~.~.~ Stationary
51  DF  .~.~.~ Piston
52  DF  .~.~.~ Plate valve
53  DF  .~.~.~ Pop valve
53.1  DF  .~.~.~.~ Bell operated
53.2  DF  .~.~.~.~.~ Bell and holder combined
53.3  DF  .~.~.~.~ Diaphragm operated
53.4  DF  .~.~.~.~ Float operated
54  DF  .~.~.~ Screw
55  DF  .~.~.~ Slide valve
58  DF  .~.~ Valves, gas and water feed
56  DF  .~.~ Automatic safety escape
57  DF  .~.~ Sludge remover
59  DF  .~ Carbide cartridges
60  DF  .~.~ Conglomerate
61  DF  GENERATORS
*  DD  .~ Hydrogen
116  DF  .~.~ Carburetor
117  DF  .~.~.~ Air
118  DF  .~.~.~ Floating oil
62 R  DF  .~ Cupola
71  DF  .~.~ Coal, oil and water
72  DF  .~.~ Coal and oil
73  DF  .~.~ Coal and water
76  DF  .~.~ Producers
77  DF  .~.~ Coal
78  DF  .~.~ Water
79  DF  .~.~.~ Carburetor
80  DF  .~.~.~.~ Fixer
81  DF  .~.~.~.~ Retort
84  DF  .~.~.~ Oil gas
82  DF  .~.~.~ Up-and-down run
83  DF  .~.~.~.~ Interlocking valves
85  DF  .~.~ Carbon monoxide
75  DF  .~.~ Oil and steam injected
63  DF  .~.~ Air and steam injected
64  DF  .~.~.~ Superheated
65  DF  .~.~ Electric
66  DF  .~.~ Rotary bottom
67  DF  .~.~ Water jacket
68  DF  .~.~.~ Rotary bottom
69  DF  .~.~ Water-seal pit
74  DF  .~.~ Refractory filling
85.1  DF  .~.~ Fuel agitating
85.1  DF  .~.~.~ Movable wall
85.2  DF  .~.~.~ Stirrer
86 R  DF  .~.~ Chargers
86 A  DF  .~.~.~ Gas making underfeed
87  DF  .~.~ Accessories
62 A  DF  .~.~ Partial combustion carburetor
89  DF  .~ Retort
98  DF  .~.~ Coal, oil and water
99  DF  .~.~ Coal and water
100  DF  .~.~ Coal and oil
101  DF  .~.~ Coal
102 R  DF  .~.~ Oil
103  DF  .~.~.~ Electric heater
104  DF  .~.~.~ Jet mixers
105  DF  .~.~.~ Steam injected
106  DF  .~.~.~ Automatic feed
107  DF  .~.~.~ Air injected
102 A  DF  .~.~.~ Utilizing heat from exhaust gases
108  DF  .~.~ Water
109  DF  .~.~.~ Carburetor
110  DF  .~.~.~ Oil gas
111  DF  .~.~ Wood
112  DF  .~.~.~ Oil
92  DF  .~.~ Metal bath
93  DF  .~.~ Oil and gas injected
94  DF  .~.~ Oil and steam injected
95  DF  .~.~.~ Air
96  DF  .~.~.~ Carburetor
90  DF  .~.~ Domestic plants
113  DF  .~.~ Furnaces
118.5  DF  .~ Portable
119  DF  RETORTS
120  DF  .~ Compounds
122  DF  .~ Inclined
123  DF  .~ Vertical
124  DF  .~ Lids
126  DF  .~ Attachments
127.1  DF  CONVERSION OF HYDROCARBON GAS AND BLENDING OF PRODUCT WITH FURTHER HYDROCARBON GAS, PROCESS
127.3  DF  METHANE (NATURAL GAS) -CONTAINING PRODUCT, OR TREATMENT OR RECOVERY PROCESS
127.5  DF  .~ Process including chemical reaction
127.7  DF  .~.~ Catalytic
127.9  DF  APPARATUS FOR CONVERTING OR TREATING HYDROCARBON GAS
144  DF  CARBURETORS
160  DF  .~ Gravity
128  DF  PURIFIERS
170  DF  CENTER AND BY-PASS VALVES
173  DF  EXHAUSTERS
174  DF  HOLDERS
175  DF  .~ High-pressure safety escape
176  DF  .~ Bell and tank
177  DF  .~.~ Sectional bell
178  DF  .~ Collapsible
179  DF  .~ Tank
180.1  DF  MIXERS
181  DF  .~ Bell and tank
182  DF  .~.~ Anterior
183  DF  .~.~ Posterior
184  DF  .~ Diaphragm
185  DF  .~ Gravity
186  DF  .~ Pump
187  DF  .~ Rotary drum
188  DF  .~.~ Anterior
189  DF  .~.~ Posterior
189.1  DF  .~ Three or more different fluids entering apparatus
189.2  DF  .~ With heating means
189.3  DF  .~ Auxilary air inlet
189.4  DF  .~ Mixer in flow path of existing mixture
189.5  DF  .~.~ Rotating mixer
189.6  DF  .~.~ Includes element made of engaged strands or fibers, e.g., screen, fabric, etc.
190  DF  DISTRIBUTION
191  DF  .~ Regulating pressure
192  DF  .~ Safety devices
193  DF  .~ Leakage
194  DF  .~.~ Preventing
195  DF  .~.~ Odorizers
197 R  DF  PROCESSES
198.1  DF  .~ Manufacture from methane (natural gas)
198.2  DF  .~.~ Employing carbon particles, porous barrier element or molten material
198.3  DF  .~.~ With specified treatment of converted product, e.g., purification, particular cooling, testing, etc.
198.5  DF  .~.~ Employing oxygen donor particles or carbidable metal particles
198.6  DF  .~.~ Specified direction of gas travel through particle mass, e.g., fluidization, flow reversal, etc.
198.7  DF  .~.~ Employing catalytic particles
198.8  DF  .~.~ With specified reactant velocity, angle of entry to reactor or mechanical energy production, e.g., use of internal combustion engine, etc.
*  DD  .~ Hydrogen
199 R  DF  .~.~ Carbureting
199 FM  DF  .~.~.~ Fuel mixtures
200  DF  .~ Coal, oil and water
201  DF  .~ Coal and oil
202  DF  .~ Coal and water
203  DF  .~ Producer
204  DF  .~ Water
205  DF  .~.~ Carbureting
206  DF  .~.~ Continuous
207  DF  .~.~ Down run
208  DF  .~.~ Up-and-down run
209  DF  .~ Wood
210  DF  .~ Coal
211  DF  .~ Oil
212  DF  .~.~ Air injected
213  DF  .~.~ Gas injected
214 R  DF  .~ Oil and steam injected
215  DF  .~.~ Air
214 A  DF  .~.~ Catalytic processes
216  DF  .~ Acetylene
217  DF  .~.~ Slow
219  DF  .~ Carbureting
197 FM  DF  .~ Fuel mixtures
197 A  DF  .~ Sewage treatment
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DIGESTS
******************************
DIG 1  DD  Recirculation of gases produced to lower part of fuel bed
DIG 2  DD  Slagging producer
DIG 3  DD  High pressure
DIG 4  DD  Powdered fuel injection
DIG 5  DD  Diffusion membrane for gas reaction or separation
DIG 6  DD  Underground gasification of coal
DIG 7  DD  Slurry
DIG 8  DD  Internal combustion engine for gas making
DIG 9  DD  Solar gasification
DIG 10  DD  Computer resisted control