US3707498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions
Assignee: Citgo Petroleum Corp
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Filing: 1970-10-30
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Granted: 1972-12-26
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Expires: 1990-10-30
Abstract
Abstract ANTIOXIDANT ADDITIVES FOR LUBRICATING OILS AND LUBRICATING OIL COMPOSITIONS CONTAINING SAID ANTIOXIDANT ADDITIVES. THE STABILITY OF LUBRICATING OIL COMPOSITION TOWARD OXIDIZING CONDITION IS MARKEDLY IMPROVED WHEN AN ANTIOXIDANT ADDITIVE COMPRISING A MIXTURE OF A METAL DIALKYLDITHIOCARBAMATE AND A TERTIARYALKYL PRIMARU A,OME IS INCORPORATED THEREIN. THE PREFERRED ADDITIVES COMPRISE CADMIUM DIAMYLDITHICARBAMATE OR ANTIMONY DIALKYLDITHIOCARBAMATE PLUS A MIXTURE OF C18 TO C22 TERTIARY-ALKYL PRIMARY AMINES.
Inventors
- 👤 Daniel Milsom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:26
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/08; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26; C10M2219/00; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10N; C10N2010/00; C10N2010/04; C10N2010/08; C10N2010/10
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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |