Patent US2490798A successfully refreshed from Google Patents.
US2490798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and process for catalytic reactions
Assignee: Standard Oil Development Co
•
Filing: 1942-12-30
•
Granted: 1949-12-13
•
Expires: 1962-12-30
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Gohr
- 👤 Homer Z Martin
- 👤 Charles E Jahnig
- 👤 Charles W Tyson
- 👤 John M Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:18
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1845; B01J8/1863; B01J8/24; C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; C10G35/00; C10G35/04; C10G35/10; C10G35/14; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00168; B01J2208/00256; B01J2208/00265; B01J2208/00274; B01J2208/00327; B01J2208/00336; B01J2208/00353; B01J2208/00504; B01J2208/0053; B01J2208/0061
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US816460A
Cited
US1984380A
Cited
US2270903A
Cited
US2253486A
Cited
US2384356A
Cited
US2325516A
Cited
US2303047A
Cited
US2362270A
Cited
US2337684A
Cited
US2439811A
Cited
US2341193A
Cited
US2304128A
Cited
US2356697A
Cited
US2340974A
Cited
US2361978A
Cited
US2367694A
Cited
US2402893A
Cited
US2363874A
Cited
US2388078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |