Patent US2394680A successfully refreshed from Google Patents.
US2394680A
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Regeneration of spent catalyst
Assignee: Universal Oil Products Co
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Filing: 1941-06-30
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Granted: 1946-02-12
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Expires: 1961-06-30
Abstract
No abstract record available.
Inventors
- 👤 Clarence G Gerhold
- 👤 Lev A Mekler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:43
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1836; B01J8/005; B01J8/0055; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00026; B01J2208/00035; B01J2208/0007; B01J2208/00079; B01J2208/00106; B01J2208/00115; B01J2208/00132; B01J2208/00477; B01J2208/00495; B01J2208/0053
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) | 1949-02-11 | 1949-08-13 | 1950-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-02-11 | 1953-08-13 | 1954-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-02-11 | 1957-08-13 | 1958-02-12 | $7700.00 | Window Closed / Lapsed |