US2461838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid bed catalyst regeneration process
Assignee: Phillips Petroleum Co
•
Filing: 1943-06-21
•
Granted: 1949-02-15
•
Expires: 1963-06-21
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Neuhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:23
CPC Classifications
B; B01; B01J; B01J38/00; B01J38/04; B01J38/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2184235A
Cited
US2265964A
Cited
US2199837A
Cited
US2350730A
Cited
US2162893A
Cited
US2249337A
Cited
US2225402A
Cited
US2290845A
Cited
US2211211A
Cited
US2311979A
Cited
US2357332A
Cited
US2320273A
Cited
US2325287A
Cited
US2388536A
Cited
US2368507A
Cited
US2382472A
Cited
US2369523A
Cited
US2353508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-15 | 1952-08-16 | 1953-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-15 | 1956-08-16 | 1957-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-15 | 1960-08-16 | 1961-02-15 | $7700.00 | Window Closed / Lapsed |