US3278437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions
Assignee: Shell USA Inc
•
Filing: 1964-01-27
•
Granted: 1966-10-11
•
Expires: 1984-01-27
Abstract
No abstract record available.
Inventors
- 👤 Lyman E Lorensen
- 👤 James W Beardmore
- 👤 Frederick M Fowkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:43
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3769; C11D3/3776; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F26/00; C08F26/06; C08F297/00; C08F297/02; C08F297/026; C08G; C08G81/00; C08G81/02; C08G81/021; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C08L39/00; C08L39/04; C08L39/06; C10; C10M; C10M149/00; C10M149/02; C10M149/10; C10M2201/00; C10M2201/02; C10M2203/00; C10M2203/10; C10M2205/00; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/289; C10M2207/34; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/06; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/083; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/047; C10M2223/06; C10M2223/065; C10M2223/12; C10M2225/00; C10M2225/04; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2040/00; C10N2040/25; C10N2040/252; C10N2040/253; C10N2050/00; C10N2050/10; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF LUBRICATING OIL AND A MINOR AMOUNT SUFFICIENT TO IMPART DETERGENCY OF AN OIL-SOLUBLE HIGH MOLECULAR WEIGHT COPOLYMER OF A POLYMERIZABLE HETERCYCLIC NITROGEN-CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF N-VINYL PRYRROLIDONE AND C-VINYL PYRIDINE AND AN ESTER OF A LOWER-ALKYL ACRYLIC ACID AND AN OXO ALCOHOL OF A HIGHLY BRANCHED-CHAIN OLEFINIC POLYMER IN THE MOLECULAR WEIGHT RANGE OF FROM 800 TO 10,000 IN THE MOLE RATIO OF 1:10 TO 10:1 RESPECTIVELY, THE MOLECULAR WEIGHT OF THE COPOLYMER RANGINT FROM 5X10**4 TO 3X10**6.
Claim 2
Dependent Claim
91 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF LUBRICATING OIL AND A MINOR AMOUNT SUFFICIENT TO IMPART DETERGENCY OF AN OIL-SOLUBLE HIGH MOLECULAR WEIGHT COPOLYMER OF A POLYMERIZABLE HETERCYCLIC NITROGEN-CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF N-VINYL PRYRROLIDONE AND C-VINYL PYRIDINE AND AN ESTER OF A LOWER-ALKYL ACRYLIC ACID AND AN OXO ALCOHOL OF A HIGHLY BRANCHED-CHAIN OLEFINIC POLYMER IN THE MOLECULAR WEIGHT RANGE OF FROM 800 TO 10,000 IN THE MOLE RATIO OF 1:10 TO 10:1 RESPECTIVELY, THE MOLECULAR WEIGHT OF THE COPOLYMER RANGINT FROM 5X10**4 TO 3X10**6.
References Cited (Backward Citations)
US2564726A
Cited
US2827359A
Cited
US3142664A
Cited
US2839512A
Cited
US2892786A
Cited
US2889282A
Cited
US3068215A
Cited
US3145195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |