US3025241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature stable grease compositions thickened with tetraimides of dipyromellitic acid anhydrides
Assignee: California Research LLC
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Filing: 1960-05-16
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Granted: 1962-03-13
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Expires: 1980-05-16
Abstract
No abstract record available.
Inventors
- 👤 John L Dreher
- 👤 Judson E Goodrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:13
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; C10; C10M; C10M5/00; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/04; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; C10M2209/108; C10M2215/00; C10M2215/086; C10M2215/24; C10M2215/28; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2227/00; C10M2227/04; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/043; C10M2229/044; C10M2229/045; C10M2229/046; C10M2229/047; C10M2229/048; C10M2229/05; C10N; C10N2040/00; C10N2040/02; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A GREASE COMPOSITION COMPRISING A MAJOR PROPORTION OF AN OIL OF LUBRICATING VISCOSITY, AND FROM ABOUT 5% TO ABOUT 40%, BY WEIGHT OF (N-ARYLPYROMELLITDIMIDO-N''ALKYLPYROMELLITDIIMIDO) ARYLENE, WHREIN SAID ARYL RADICAL IS SELECTED FROM THE GROUP CONSISTING OF A BENZENE RADICAL AND SUBSTITUTED BENZENE RADICALS CONTAINING A TOTAL OF 6-20 CARBON ATOMS, SAID ALKYL RADICAL CONTAINS FROM 6-22 CARBON ATOMS, AND SAID ARYLENE RADICAL IS A PHENYLENE RADICAL.
Claim 2
Dependent Claim
66 words
A GREASE COMPOSITION COMPRISING A MAJOR PROPORTION OF AN OIL OF LUBRICATING VISCOSITY, AND FROM ABOUT 5% TO ABOUT 40%, BY WEIGHT OF (N-ARYLPYROMELLITDIMIDO-N''ALKYLPYROMELLITDIIMIDO) ARYLENE, WHREIN SAID ARYL RADICAL IS SELECTED FROM THE GROUP CONSISTING OF A BENZENE RADICAL AND SUBSTITUTED BENZENE RADICALS CONTAINING A TOTAL OF 6-20 CARBON ATOMS, SAID ALKYL RADICAL CONTAINS FROM 6-22 CARBON ATOMS, AND SAID ARYLENE RADICAL IS A PHENYLENE RADICAL.
References Cited (Backward Citations)
US2547496A
Cited
GB762152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |