US2446925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cracking of hydrocarbons with suspended catalyst
Assignee: Standard Oil Development Co
•
Filing: 1941-07-05
•
Granted: 1948-08-10
•
Expires: 1961-07-05
Abstract
No abstract record available.
Inventors
- 👤 Charles E Hemminger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:19
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; B; B01; B01J; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00168; B01J2208/00194
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1799757A
Cited
US1873783A
Cited
US2078947A
Cited
US2143949A
Cited
US2231231A
Cited
US2248196A
Cited
US2312445A
Cited
US2320273A
Cited
US2288613A
Cited
US2303680A
Cited
US2326705A
Cited
US2273076A
Cited
US2311984A
Cited
US2320562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-10 | 1952-02-09 | 1952-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-10 | 1956-02-09 | 1956-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-10 | 1960-02-09 | 1960-08-10 | $7700.00 | Window Closed / Lapsed |