US2437531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic treatment of hydrocarbons
Assignee: Union Oil Company of California
•
Filing: 1942-12-24
•
Granted: 1948-03-09
•
Expires: 1962-12-24
Abstract
No abstract record available.
Inventors
- 👤 Hal C Huffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:26
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J21/00; B01J21/12; B01J23/16; B01J23/24; B01J23/28; B01J23/882; C; C10; C10G; C10G35/00; C10G35/04; C10G35/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2183591A
Cited
US1782857A
Cited
US1994277A
Cited
US2102160A
Cited
US2098960A
Cited
US2134543A
Cited
US2242387A
Cited
US2283173A
Cited
US2216262A
Cited
US2270165A
Cited
US2217014A
Cited
US2209908A
Cited
US2288336A
Cited
US2348624A
Cited
US2374404A
Cited
US2377728A
Cited
US2283854A
Cited
US2348599A
Cited
US2361611A
Cited
US2341792A
Cited
US2395836A
Cited
US2373254A
Cited
US2378208A
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 |