US3380928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil composition
Assignee: Shell USA Inc
•
Filing: 1959-03-27
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Granted: 1968-04-30
•
Expires: 1979-03-27
Abstract
No abstract record available.
Inventors
- 👤 Hughes John
- 👤 Joseph M Soesan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:54
CPC Classifications
C; C10; C10M; C10M161/00; C10M137/00; C10M145/00; C10M145/02; C10M145/10; C10M145/12; C10M145/14; C10M149/00; C10M149/02; C10M149/10; C10M2201/00; C10M2201/08; C10M2201/082; C10M2201/083; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/04; C10M2205/22; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/282; C10M2207/287; C10M2207/289; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/044; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/026; C10M2217/028; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/086; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/043; C10M2223/045; C10M2223/047; C10M2223/06; C10M2223/061; C10M2223/063; C10M2223/065; C10M2223/12; C10M2225/00; C10M2225/02; C10M2225/04; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A HYDROCARBON LUBRICATING OIL CONTAINING FROM ABOUT 0.1% TO ABOUT 15% BY WEIGHT OF AN OIL SOLUBLE ALKYLDITHIOPHOSPHORIC ACID SALT OF A COPOLYMER FORMED BY THE REACTION OF (1) AN UNSATURATED COMPOUND HAVING A POLYMERIZABLE ETHYLENIC LINKAGE SELECTED FROM THE GROUP CONSISTING OF AMINE-FREE ACRYLIC AND ALKACRYLIC ACID ESTERS HAVING FROM ABOUT 10 TO ABOUT 18 CARBON ATOMS IN THE ESTER GROUP AND (2) AN UNSATURATED COMPOUND HAVING A POLYMERIZABLE ETHYLENIC LINKAGE AND A BASIS AMINO NITROGEN AND SELECTED FROM THE GROUP CONSISTING OF A VINYL PYRIDINE AND ACRYLIC AND ALKACRYLIC ESTERS OF BASIC AMINE ALCOHOLS.
Claim 2
Dependent Claim
96 words
A HYDROCARBON LUBRICATING OIL CONTAINING FROM ABOUT 0.1% TO ABOUT 15% BY WEIGHT OF AN OIL SOLUBLE ALKYLDITHIOPHOSPHORIC ACID SALT OF A COPOLYMER FORMED BY THE REACTION OF (1) AN UNSATURATED COMPOUND HAVING A POLYMERIZABLE ETHYLENIC LINKAGE SELECTED FROM THE GROUP CONSISTING OF AMINE-FREE ACRYLIC AND ALKACRYLIC ACID ESTERS HAVING FROM ABOUT 10 TO ABOUT 18 CARBON ATOMS IN THE ESTER GROUP AND (2) AN UNSATURATED COMPOUND HAVING A POLYMERIZABLE ETHYLENIC LINKAGE AND A BASIS AMINO NITROGEN AND SELECTED FROM THE GROUP CONSISTING OF A VINYL PYRIDINE AND ACRYLIC AND ALKACRYLIC ESTERS OF BASIC AMINE ALCOHOLS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |