US2137275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of reconstituting and dehydrogenating heavier hydrocarbons and making an antiknock gasoline
Assignee: Standard Oil Development Co
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Filing: 1935-09-20
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Granted: 1938-11-22
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Expires: 1955-09-20
Abstract
No abstract record available.
Inventors
- 👤 Ellis Carleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:58
CPC Classifications
C; C10; C10G; C10G11/00; B; B01; B01J; B01J8/00; B01J8/02; B01J8/0242; B01J8/025; C10G11/10; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00168; B01J2208/00203; B01J2208/00265; B01J2208/00274
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) | 1941-11-21 | 1942-05-23 | 1942-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-11-21 | 1946-05-23 | 1946-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-11-21 | 1950-05-23 | 1950-11-22 | $7700.00 | Window Closed / Lapsed |