US3313733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions containing microgel polymers of divinylbenzene and polyethylene glycol methacrylates
Assignee: Chevron USA Inc
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Filing: 1965-04-29
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Granted: 1967-04-11
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Expires: 1985-04-29
Abstract
No abstract record available.
Inventors
- 👤 Vries Louis De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:25
CPC Classifications
C; C10; C10M; C10M177/00; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1812; C10M143/00; C10M145/00; C10M145/02; C10M149/00; C10M149/02; C10M159/00; C10M159/005; C10M2205/00; C10M2205/02; C10M2205/04; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/109; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/024; C10M2217/028; C10M2217/04; C10M2217/044; C10M2217/045; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/045; C10M2223/06; C10M2223/063; C10M2227/00; C10M2227/09; C10M2229/00; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF MINERAL LUBRICATING OIL AND A MINOR PROPORTION SUFFICIENT TO IMPROVE THE DETERGENT AND VISCOSITY-TEMPERATURE CHARACTERISTICS THEREOF OF A POLYMER PARED BY THE PROCESS WHICH COMPRISES FORMING A MIXTURE CONSISTING OF DIVINYLBENZENE, DODECYL METHACRYLATE AND POLYETHYLENE GLYCOL METHACRYLATES IN WHICH THE POLYETHYLENE GLYCOL HAS A MOLECULAR WEIGHT OF FROM ABOUT 200 TO 10,000, SAID MIXTURE CONSISTING OF FROM 5 TO 15% BY WEIGHT OF DIVINYLBENZENE, EMULSIFYING SAID MIXTURE IN WATER BY MEANS OF A WATER-SOLUBLE EMULSIFYING AGENT, POLYMERIZING SAID MIXTURE IN SAID EMULSION BY MEANS OF A WATE -SOLUBLE PER OXIDE FREE RADICAL INITIATOR CATALYST UNDER CONDITIONS PROVIDING A PLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 5,000,000 TO ABOUT 50,000,000 AS DETERMINED BY ULTRACENTRIFUGE AND SEPARATING THE RESULTING POLYMER FROM THE WATER.
Claim 2
Dependent Claim
134 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF MINERAL LUBRICATING OIL AND A MINOR PROPORTION SUFFICIENT TO IMPROVE THE DETERGENT AND VISCOSITY-TEMPERATURE CHARACTERISTICS THEREOF OF A POLYMER PARED BY THE PROCESS WHICH COMPRISES FORMING A MIXTURE CONSISTING OF DIVINYLBENZENE, DODECYL METHACRYLATE AND POLYETHYLENE GLYCOL METHACRYLATES IN WHICH THE POLYETHYLENE GLYCOL HAS A MOLECULAR WEIGHT OF FROM ABOUT 200 TO 10,000, SAID MIXTURE CONSISTING OF FROM 5 TO 15% BY WEIGHT OF DIVINYLBENZENE, EMULSIFYING SAID MIXTURE IN WATER BY MEANS OF A WATER-SOLUBLE EMULSIFYING AGENT, POLYMERIZING SAID MIXTURE IN SAID EMULSION BY MEANS OF A WATE -SOLUBLE PER OXIDE FREE RADICAL INITIATOR CATALYST UNDER CONDITIONS PROVIDING A PLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 5,000,000 TO ABOUT 50,000,000 AS DETERMINED BY ULTRACENTRIFUGE AND SEPARATING THE RESULTING POLYMER FROM THE WATER.
References Cited (Backward Citations)
US2744844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |