US2475650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage process of regenerating a fluidized catalyst
Assignee: Standard Oil Development Co
•
Filing: 1943-10-28
•
Granted: 1949-07-12
•
Expires: 1963-10-28
Abstract
No abstract record available.
Inventors
- 👤 William I Thompson
- 👤 Charles W Tyson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:17
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1845; B01J8/1863
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1577534A
Cited
US2199838A
Cited
US2320273A
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US2311564A
Cited
US2273076A
Cited
US2327489A
Cited
US2434602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-11 | 1953-01-10 | 1953-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-11 | 1957-01-10 | 1957-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-11 | 1961-01-10 | 1961-07-12 | $7700.00 | Window Closed / Lapsed |