US3732334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft copolymeric lubricating oil additives
Assignee: ROHM GmbH DT
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Filing: 1971-06-16
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Granted: 1973-05-08
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Expires: 1991-06-16
Abstract
Abstract GRAFT COPOLYMERS USEFUL AS LUBRICATING OIL ADDITIVES ARE PREPARED BY GRAFTING AN IMIDAZOLE HAVING AN OLE FINICALLY UNSATURATED GROUP IN THE 1-POSITION, E.G. A 1VINYL-2-ALKYL-IMIDAZOLE, ON A BACKBONE POLYMER COMPRISING ACRYLATE, METHACRYLATE, FUMARATE, AND/OR ITACONATE ESTERS.
Inventors
- 👤 E Koch
- 👤 U Schoedel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:33
CPC Classifications
C; C10; C10M; C10M151/00; C10M151/02; C08; C08F; C08F255/00; C08F255/08; C08F255/10; C08F265/00; C08F265/04; C08F267/00; C08F267/04; C08F291/00; C10M1/00; C10M1/08; C10M149/00; C10M149/02; C10M149/10; C10M2203/00; C10M2203/10; C10M2203/102; C10M2205/00; C10M2205/02; C10M2205/026; C10M2209/00; C10M2209/02; C10M2209/08; C10M2215/00; C10M2215/22; C10M2215/223; C10M2215/224; C10M2217/00; C10M2217/02; C10M2217/024; C10M2217/028; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2221/00; C10M2221/02; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10N; C10N2010/00; C10N2010/04
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |