Patent US2886590A successfully refreshed from Google Patents.
US2886590A
Expired / Lapsed
US
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Diester lubricant
Assignee: Gulf Research and Development Co
•
Filing: 1957-08-28
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Granted: 1959-05-12
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Expires: 1977-08-28
Abstract
No abstract record available.
Inventors
- 👤 Charles W Montgomery
- 👤 William I Gilbert
- 👤 John G Mcnulty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:10
CPC Classifications
C; C10; C10M; C10M3/00; C07; C07C; C07C67/00; C07C67/48; C07C67/58; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10N; C10N2040/00; C10N2040/08
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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |