Patent US3733187A successfully refreshed from Google Patents.
US3733187A
Expired / Lapsed
US
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Process for converting solid wastes to pipeline gas
Assignee: United States Department of the Interior
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Filing: 1971-06-07
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Granted: 1973-05-15
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Expires: 1991-06-07
Abstract
Abstract SOLID WASTES ARE HEATED TO 500*C.-675*C. AT 10003000 P.S.I.G. IN PRESENCE OF GAS CONTAINING AT LEAST 90 MOLE PERCENT HYDROGEN TO CONVERT SAID WASTES TO A METHANEAND ETHANE-CONTAINING GAS HAVING NO CONDENSABLE OILS AND TARS. THE CARBONACEOUS RESIDUE IS ALSO FREE OF TARS AND OILS,
Inventors
- 👤 H Feldmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:05
CPC Classifications
C; C10; C10L; C10L3/00; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0485
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |