US2416729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst technique
Assignee: Standard Oil Co
•
Filing: 1940-12-31
•
Granted: 1947-03-04
•
Expires: 1960-12-31
Abstract
No abstract record available.
Inventors
- 👤 Maurice H Arveson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:29
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1845; B01J8/1863
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1123201A
Cited
US2060936A
Cited
US2209346A
Cited
US2264438A
Cited
US2253486A
Cited
US2296722A
Cited
US2283832A
Cited
US2320273A
Cited
US2349574A
Cited
US2311564A
Cited
US2326705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-03 | 1950-09-02 | 1951-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-03 | 1954-09-02 | 1955-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-03 | 1958-09-02 | 1959-03-04 | $7700.00 | Window Closed / Lapsed |