US3785979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dibenzimidazole grease thickening agents
Assignee: Shell USA Inc
•
Filing: 1972-10-11
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Granted: 1974-01-15
•
Expires: 1992-10-11
Abstract
Abstract DIBENZIMIDAZOLE COMPOUNDS CORRESPONDING TO THE FORMULA: 2-((5-(R1-X-CO-NH-R4-NH-CO-NH-)BENZIMIDAZOL-2-YL)-R3-), WHEREIN R1 AND R2 ARE ALIPHATIC HYDROCARBYL RADICALS, R3 IS A HYDROCARBYLENE RADICAL, R4 AND R5 ARE AROMATIC HYDROCARBYLENE RADICALS AND X IS -O- OR -NH5-(R2-X-CO-NH-R5-NH-CO-NH-)BENZIMIDAZOLE ARE HIGHLY EFFICACIOUS GREASE THICKENING AGENTS.
Inventors
- 👤 A Birke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:59
CPC Classifications
C; C10; C10M; C10M5/00; C10M2201/00; C10M2201/08; C10M2201/082; C10M2201/083; C10M2205/00; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/289; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/08; C10M2215/082; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/224; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/28; C10M2215/30; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/10; C10M2219/104; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10N; C10N2050/00; C10N2050/10
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |