US3544291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal gasification process
Assignee: Texaco Inc
•
Filing: 1968-04-22
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Granted: 1970-12-01
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Expires: 1988-04-22
Abstract
No abstract record available.
Inventors
- 👤 Warren G Schlinger
- 👤 William L Slater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:54
CPC Classifications
C; C10; C10J; C10J1/00; C10J1/207; C10J3/00; C10J3/46; C10J3/48; C10J3/485; C10J3/72; C10J3/74; C10J3/76; C10J3/78; C10J3/82; C10J3/84; C10J3/845; C10K; C10K1/00; C10K1/08; C10K1/10; C10K1/101; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0943; C10J2300/0946; C10J2300/0953; C10J2300/0956; C10J2300/0959; C10J2300/0973; C10J2300/0976; C10J2300/18; C10J2300/1807; C10J2300/1846
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |