Patent US2632735A successfully refreshed from Google Patents.
US2632735A
Expired / Lapsed
US
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Lubricating oil additives
Assignee: Standard Oil Development Co
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Filing: 1951-03-01
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Granted: 1953-03-24
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Expires: 1971-03-01
Abstract
No abstract record available.
Inventors
- 👤 Roger S Hawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:07
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07C; C07C327/00; C10M2201/00; C10M2201/02; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/06; C10M2219/08; C10M2219/082; C10M2219/085; C10N; C10N2040/00; C10N2040/20; C10N2040/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
AN ADDITIVE MATERIAL FOR LUBRICANTS HAVING THE FOLLOWING FORMULA-
Claim 2
Dependent Claim
9 words
AN ADDITIVE MATERIAL FOR LUBRICANTS HAVING THE FOLLOWING FORMULA-
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) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |