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US2398899A
Expired / Lapsed
US
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Catalyst
Assignee: Sinclair Refining Co
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Filing: 1942-05-22
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Granted: 1946-04-23
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Expires: 1962-05-22
Abstract
No abstract record available.
Inventors
- 👤 John W Teter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:55
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/60; B; B01; B01J; B01J23/00; B01J23/70; C07C253/00; C07C253/18; B01J37/00; B01J37/02; B01J37/0201
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) | 1949-04-22 | 1949-10-22 | 1950-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-22 | 1953-10-22 | 1954-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-22 | 1957-10-22 | 1958-04-23 | $7700.00 | Window Closed / Lapsed |