Patent US4248719A successfully refreshed from Google Patents.
US4248719A
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Quaternary ammonium salts and lubricating oil containing said salts as dispersants
Assignee: Afton Chemical Additives Corp
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Filing: 1979-08-24
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Granted: 1981-02-03
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Expires: 1999-08-24
Abstract
Abstract Quaternary ammonium salts prepared by reacting an alkenylsuccinimide with a monocarboxylic acid ester provide improved dispersancy in lubricating oils, as compared with the starting alkenylsuccinimides.
Inventors
- 👤 Harry Chafetz
- 👤 Gary D. Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:18
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/40; C07D207/404; C07D207/408; C07D207/412; C10; C10M; C10M133/00; C10M133/52; C10M133/56; C10M2203/00; C10M2203/10; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/06; C10M2215/064; C10M2215/086; C10M2215/24; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2219/00; C10M2219/04; C10M2219/046; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2225/00; C10M2225/04; C10M2225/041; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/02; C10N2040/08; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
82 words
A quaternary ammonium salt suitable as a detergent-dispersant in lubricating oils, said salt having the formula: ##STR4## wherein R is a substituted aryl group having from 6 to 10 carbon atoms; R 1 is a lower alkyl group of 1 to 5 carbon atoms, R 2 and R 3 are the same or different alkyl groups having from 1 to 8 carbon atoms and R 4 is an alkenylsuccinimidyl alkyl or an alkenylsuccinoxy alkyl group having from 60 to 200 carbon atoms.
Claim 2
Dependent Claim
82 words
A quaternary ammonium salt suitable as a detergent-dispersant in lubricating oils, said salt having the formula: ##STR4## wherein R is a substituted aryl group having from 6 to 10 carbon atoms; R 1 is a lower alkyl group of 1 to 5 carbon atoms, R 2 and R 3 are the same or different alkyl groups having from 1 to 8 carbon atoms and R 4 is an alkenylsuccinimidyl alkyl or an alkenylsuccinoxy alkyl group having from 60 to 200 carbon atoms.
Claim 3
Dependent Claim
29 words
The salt of claim 1, wherein R is 2-hydroxybenzene; R 1 , R 2 , and R 3 are methyl, R 4 is polybutenylsuccinimidylethyl having about 100 carbon atoms.
Claim 4
Dependent Claim
24 words
The salt of claim 1, wherein R is a nitro, cyano, carboalkoxy or hydroxy substituted aryl group, said aryl group being phenyl or naphthyl.
Claim 5
Dependent Claim
28 words
A lubricating oil composition comprising a major proportion of a base oil of lubricating viscosity and a minor dispersant amount of a product as defined in claim 1.
Claim 6
Dependent Claim
20 words
The composition of claim 3 wherein said oil has an SUS viscosity at 100° F. of between 50 and 2000.
Claim 7
Dependent Claim
21 words
The composition of claim 3 wherein said oil has an SUS viscosity at 100° F. of between about 100 and 600.
Claim 8
Dependent Claim
16 words
The composition of claim 3 containing between about 0.1 and 10 weight percent of said product.
Claim 9
Dependent Claim
16 words
The composition of claim 3 containing between about 0.5 and 5 weight percent of said product.
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) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |