US2709157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Greases thickened with phenylene diamides
Assignee: California Research LLC
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Filing: 1951-06-28
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Granted: 1955-05-24
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Expires: 1971-06-28
Abstract
No abstract record available.
Inventors
- 👤 Bruce W Hotten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:59
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/10; C10M2203/102; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; C10M2209/109; C10M2215/00; C10M2215/08; C10M2215/082; C10M2215/24; C10M2215/28; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2227/00; C10M2227/02; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A GREASE COMPOSITION COMPRISING A MAJOR PROPORTION OF AN OIL OF LUBRICATING VISCOSITY AND A SMALL AMOUNT, SUFICIENT TO THICKEN THE LUBRICATING OIL TO THE CONSISTENCY OF A GREASE , OF ALIPHATIC ACYL PHENYLENE DIAMINE CONTAINING A TOTAL OF FROM 18 TO 30 CARBON ATOMS AND NOT MORE THAN ONE ACYL GROUP ATTACHED TO A NITROGEN ATOM.
Claim 2
Dependent Claim
57 words
A GREASE COMPOSITION COMPRISING A MAJOR PROPORTION OF AN OIL OF LUBRICATING VISCOSITY AND A SMALL AMOUNT, SUFICIENT TO THICKEN THE LUBRICATING OIL TO THE CONSISTENCY OF A GREASE , OF ALIPHATIC ACYL PHENYLENE DIAMINE CONTAINING A TOTAL OF FROM 18 TO 30 CARBON ATOMS AND NOT MORE THAN ONE ACYL GROUP ATTACHED TO A NITROGEN ATOM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |