US2274749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon copolymer and method of preparing same
Assignee: Standard Oil Development Co
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Filing: 1937-07-17
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Granted: 1942-03-03
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Expires: 1957-07-17
Abstract
No abstract record available.
Inventors
- 👤 William H Smyers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:07
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F210/00; C08F210/04; C08F210/08; C08F210/10; C08F244/00; C10; C10M; C10M2201/00; C10M2201/04; C10M2201/041; C10M2201/042; C10M2201/06; C10M2201/062; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2209/00; C10M2209/02; C10M2209/04; C10M2209/06; C10M2209/062; C10M2209/12; C10M2211/00; C10M2211/02; C10N; C10N2010/00; C10N2010/06; C10N2010/08; C10N2040/00; C10N2040/14; C10N2040/16; C10N2040/17
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 |