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US2674568A
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High viscosity index lubricating oil
Assignee: Standard Oil Development Co
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Filing: 1950-07-26
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Granted: 1954-04-06
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Expires: 1970-07-26
Abstract
No abstract record available.
Inventors
- 👤 James G Lillard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:21
CPC Classifications
C; C10; C10M; C10M101/00; C10M101/02; C10M2203/00; C10M2203/10; C10M2203/1006; C10M2203/102; C10M2203/1025; C10M2203/104; C10M2203/1045; C10M2203/106; C10M2203/1065; C10M2203/108; C10M2203/1085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2018871A
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US2165432A
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US2441572A
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US2552436A
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US2572866A
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US2576525A
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US2560448A
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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) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |