US3827981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tertiary diamide lubricants
Assignee: Sun Research and Development Co
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Filing: 1972-10-02
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Granted: 1974-08-06
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Expires: 1992-10-02
Abstract
Abstract NOVEL SYNTHETIC LUBRICANTS CONTAINING A MAJOR AMOUNT OF TERTIARY DIAMIDES HAVING THE FOLLOWING STRUCTURAL FORMULA: R-CO-N(-CH3)-CH2-C(-CH3)2-(CH2)N-C(-CH3)2-CH2-N(-CH3)-CO-R WHEREIN N= 0-10 R=-(CH2)M-CH3 WHEREIN M= 4-12 ARE DISCLOSED. THERE LUBRICANTS HAVE LOW POUR POINTS AND POSITIVE VISCOSITY INDEXES.
Inventors
- 👤 R Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:57
CPC Classifications
C; C07; C07C; C07C255/00; C07C209/00; C07C209/44; C07C209/48; C08; C08K; C08K5/00; C08K5/16; C08K5/20; C09; C09K; C09K5/00; C09K5/08; C10; C10M; C10M105/00; C10M105/56; C10M105/68; C10M133/00; C10M133/02; C10M133/16; C10M2215/00; C10M2215/08; C10M2215/0806; C10N; C10N2020/00; C10N2020/01; C10N2020/02
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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |