US2296406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing catalyst
Assignee: Standard Oil Development Co
•
Filing: 1940-07-25
•
Granted: 1942-09-22
•
Expires: 1960-07-25
Abstract
No abstract record available.
Inventors
- 👤 William E Spicer
- 👤 Rhea N Watts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:40
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/12; B01; B01J; B01J13/00; B01J13/0004; B01J13/0008; B01J13/0017; B01J21/00; B01J21/02; B01J21/04; B01J21/16; B01J37/00; B01J37/02; B01J37/0236; C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; G; G05; G05B; G05B19/00; G05B19/02; G05B19/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-09-21 | 1946-03-23 | 1946-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-09-21 | 1950-03-23 | 1950-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-09-21 | 1954-03-23 | 1954-09-22 | $7700.00 | Window Closed / Lapsed |