US4021357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multifunctional tetrapolymer lube oil additive
Assignee: Texaco Inc
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Filing: 1972-03-10
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Granted: 1977-05-03
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Expires: 1992-03-10
Abstract
Abstract A tetrapolymer of a first alkyl methacrylate of the formula: ##STR1## a second alkyl methacrylate of the formula: ##STR2## a third alkyl methacrylate of the formula: ##STR3## and a N, N-dialkylaminoalkyl methacrylamide of the formula: ##STR4## where R is alkyl of from 1 to 5 carbons, R 1 is alkyl of from 10 to 15 carbons, R 2 is alkyl of from 16 to 20 carbons, R 3 and R 4 are alkyl of from 1 to 2 carbons and A is a divalent alkylene radical of from 2 to 4 carbons, and hydrocarbon lubricating oil compositions containing dispersant and VI improving amounts of said tetrapolymer.
Inventors
- 👤 Abraham Morduchowitz
- 👤 Terence B. Jordan
- 👤 Isaac D. Rubin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:13
CPC Classifications
C; C10; C10M; C10M149/00; C10M149/02; C10M149/06; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1812; C08F220/1804; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2205/17; C10M2205/173; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2217/00; C10M2217/02; C10M2217/024; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/04; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2225/00; C10M2225/04; C10M2225/041; C10N; C10N2010/00; C10N2010/04; C10N2020/00; C10N2020/01; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
139 words
A lubricating oil composition containing a major amount of hydrocarbon lubricating oil and between about 1 and 15 wt. % of a tetrapolymer of a first alkyl methacrylate of the formula: ##STR9## a second alkyl methacrylate: ##STR10## a third alkyl methacrylate: ##STR11## a N,N-dialkylaminoalkyl methacrylamide of the formula: ##STR12## where R is alkyl of from 1 to 5 carbons, R 1 is alkyl of from 10 to 15 carbons, R 2 is alkyl of from 16 to 20 carbons, R 3 and R 4 are alkyl of from 1 to 2 carbons and A is a divalent alkylene radical of from 2 to 4 carbons, said tetrapolymer having an intrinsic viscosity in benzene at 77° F. of between about 0.18 and 2.15, and a component weight ratio of first methacrylate:second methacrylate:third methacrylate:dialkylaminoalkyl methacrylamide of between about 15:62:20:3 and 25:40:25:10.
Claim 2
Dependent Claim
139 words
A lubricating oil composition containing a major amount of hydrocarbon lubricating oil and between about 1 and 15 wt. % of a tetrapolymer of a first alkyl methacrylate of the formula: ##STR9## a second alkyl methacrylate: ##STR10## a third alkyl methacrylate: ##STR11## a N,N-dialkylaminoalkyl methacrylamide of the formula: ##STR12## where R is alkyl of from 1 to 5 carbons, R 1 is alkyl of from 10 to 15 carbons, R 2 is alkyl of from 16 to 20 carbons, R 3 and R 4 are alkyl of from 1 to 2 carbons and A is a divalent alkylene radical of from 2 to 4 carbons, said tetrapolymer having an intrinsic viscosity in benzene at 77° F. of between about 0.18 and 2.15, and a component weight ratio of first methacrylate:second methacrylate:third methacrylate:dialkylaminoalkyl methacrylamide of between about 15:62:20:3 and 25:40:25:10.
Claim 3
Dependent Claim
52 words
A hydrocarbon lubricating composition in accordance with claim 1 wherein R is butyl, R 1 is dodecyl, R 2 is octadecyl, R 3 and R 4 are methyl and A is -- CH 2 CH 2 CH 2 --, said intrinsic viscosity is about 0.85 and said weight ratio is about 21:50:25:4.
Claim 4
Dependent Claim
52 words
A hydrocarbon lubricating oil composition in accordance with claim 1 wherein R is butyl, R 1 is dodecyl, R 2 is octadecyl, R 3 and R 4 are methyl and A is -- CH 2 CH 2 CH 2 --, said intrinsic viscosity is about 0.92 and said weight ratio is 4:10:5:1.
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) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |