Patent US4097486A successfully refreshed from Google Patents.
Patent US2437487A successfully refreshed from Google Patents.
US2437487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of reducing a metal oxide catalyst
Assignee: Sinclair Refining Co
•
Filing: 1944-10-12
•
Granted: 1948-03-09
•
Expires: 1964-10-12
Abstract
No abstract record available.
Inventors
- 👤 John W Teter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:30
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; 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)
US1320039A
Cited
US1329323A
Cited
US1483412A
Cited
US1489497A
Cited
US2287891A
Cited
US2120958A
Cited
US2294414A
Cited
US2274639A
Cited
US2267735A
Cited
US2385843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |