US2274633A
Expired / Lapsed
US
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Catalytically treating hydrocarbons
Assignee: Standard Oil Co
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Filing: 1940-02-21
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Granted: 1942-03-03
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Expires: 1960-02-21
Abstract
No abstract record available.
Inventors
- 👤 Edgar C Pitzer
- 👤 Heard Llewellyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:08
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/02; B01J37/03; B01J37/036; B01J21/00; B01J21/02; B01J21/04; B01J21/14; B01J23/00; B01J23/16; B01J23/24; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G35/00; C10G35/04; C10G35/06
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) | 1945-03-02 | 1945-09-01 | 1946-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-02 | 1949-09-01 | 1950-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-02 | 1953-09-01 | 1954-03-03 | $7700.00 | Window Closed / Lapsed |