Patent US3755433A successfully refreshed from Google Patents.
US3755433A
Expired / Lapsed
US
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Ashless lubricating oil dispersant
Assignee: Texaco Inc
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Filing: 1971-12-16
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Granted: 1973-08-28
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Expires: 1991-12-16
Abstract
Abstract POLYISOBUTENYL-SUBSTITUTED N-AMINOETHYLETHANOLAMINES ARE PROVIDED WHICH FUNCTION AS AHSLESS NITROGEN-CONTAINING DISPERSANTS FOR LUBRICATING OIL COMPOSITIONS.
Inventors
- 👤 E Miller
- 👤 W Hellmuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:45
CPC Classifications
C; C10; C10M; C10M133/00; C10M133/52; C10M133/54; C10M1/00; C10M1/08; C10M2207/00; C10M2207/04; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2209/00; C10M2209/10; C10M2209/103; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2221/00; C10M2221/04; C10M2221/043; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |