US2491303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic conversion of hydrocarbon oil
Assignee: Texaco Inc
•
Filing: 1946-09-23
•
Granted: 1949-12-13
•
Expires: 1966-09-23
Abstract
No abstract record available.
Inventors
- 👤 Eastman Du Bois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:35
CPC Classifications
C; C10; C10G; C10G11/00; B; B01; B01J; B01J38/00; B01J38/04; B01J38/12; C10G11/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1973851A
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US2073638A
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US2137275A
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US2161676A
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US2174196A
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US2246345A
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US2319590A
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US2357332A
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US2388536A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |