Patent US2773915A successfully refreshed from Google Patents.
US2773915A
Expired / Lapsed
US
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Pour point depressant
Assignee: ConocoPhillips Co
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Filing: 1954-06-01
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Granted: 1956-12-11
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Expires: 1974-06-01
Abstract
No abstract record available.
Inventors
- 👤 Edwin R Baker
- 👤 Marion L Sharrah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:00
CPC Classifications
C; C07; C07D; C07D339/00; C07D339/02; C07D339/04; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/22; C10M2219/00; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10M2225/00; C10M2225/04; C10M2225/041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |