Patent US3576742A successfully refreshed from Google Patents.
US3576742A
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Polyisobutylene nitrogen oxide reaction products as lubricating oil detergents
Assignee: Chevron USA Inc
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Filing: 1968-07-15
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Granted: 1971-04-27
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Expires: 1988-07-15
Abstract
Abstract LUBRICATING OIL DETERGENTS ARE PREPARED BY REACTING AN OIL SOLUBLE BRANCHES LONG-CHAIN ALIPHATIC HYDROCARBON OLEFIN WITH NITROGEN OXIDES, OPTIONALLY TREATING THE PRODUCT WITH NITRIC ACID OR AN AMINE, AND THEN USING THE COMPLEX REACTION PRODUCT AS THE DETERGENT.
Inventors
- 👤 Lewis R Honnen
- 👤 Louis De Vries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:58
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/06; C10M2205/00; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/20; C10M2215/202; C10M2215/204; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |