Patent US2408996A successfully refreshed from Google Patents.
US2408996A
Expired / Lapsed
US
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Catalyst rejuvenation
Assignee: Union Oil Company of California
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Filing: 1943-06-09
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Granted: 1946-10-08
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Expires: 1963-06-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert L Parker
- 👤 Hal C Huffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:04
CPC Classifications
B; B01; B01J; B01J38/00; B01J38/04; B01J38/12; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/901
Claims Analysis
Total Claims: 0
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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) | 1949-10-07 | 1950-04-08 | 1950-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-10-07 | 1954-04-08 | 1954-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-10-07 | 1958-04-08 | 1958-10-08 | $7700.00 | Window Closed / Lapsed |