US Patent Class 48
GAS: HEATING AND ILLUMINATING-- Main Headings
 Electronic File Wrappers |  Electronic Patent Documents |  Paper Patent Documents | Current as of: June, 1999
|  and Services |
| Electronic File Wrappers | Electronic Patent Documents | Paper Patent Documents | Current as of: June, 1999
| and Services |
| CLASS NOTES | ||
| * | DF | ACETYLENE {5} |
| 61 | DF | GENERATORS {4} |
| 119 | DF | RETORTS {5} |
| 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 {1} |
| 127.9 | DF | APPARATUS FOR CONVERTING OR TREATING HYDROCARBON GAS |
| 144 | DF | CARBURETORS {1} |
| 128 | DF | PURIFIERS |
| 170 | DF | CENTER AND BY-PASS VALVES |
| 173 | DF | EXHAUSTERS |
| 174 | DF | HOLDERS {4} |
| 180.1 | DF | MIXERS {9} |
| 190 | DF | DISTRIBUTION {3} |
| 197 R | DF | PROCESSES {15} |
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| DIGESTS | ||
| ****************************** | ||
| DIG 1 | DF | Recirculation of gases produced to lower part of fuel bed |
| DIG 2 | DF | Slagging producer |
| DIG 3 | DF | High pressure |
| DIG 4 | DF | Powdered fuel injection |
| DIG 5 | DF | Diffusion membrane for gas reaction or separation |
| DIG 6 | DF | Underground gasification of coal |
| DIG 7 | DF | Slurry |
| DIG 8 | DF | Internal combustion engine for gas making |
| DIG 9 | DF | Solar gasification |
| DIG 10 | DF | Computer resisted control |