Patent US307141A successfully refreshed from Google Patents.
US3404100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methane production using a promoted catalyst
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1963-10-21
•
Granted: 1968-10-01
•
Expires: 1983-10-21
Abstract
No abstract record available.
Inventors
- 👤 William F Taylor
- 👤 John H Sinfelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:44
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/83; C; C10; C10G; C10G11/00; C10G11/02; B01J37/00; B01J37/02; B01J37/0201
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2119565A
Cited
US2151329A
Cited
US2094117A
Cited
US2337191A
Cited
US2449295A
Cited
US2814599A
Cited
GB820257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |