Patent US3671433A successfully refreshed from Google Patents.
US3671433A
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Lubricant compositions
Assignee: Dow Silicones Corp
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Filing: 1970-12-17
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Granted: 1972-06-20
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Expires: 1990-12-17
Abstract
Abstract The lubrication characteristics of alkylmethylpolysiloxanes in which the alkyl radical contains from six-18 carbon atoms are improved by the addition of from about 0.1 to 3 weight percent dodecenyl succinic acid anhydride.
Inventors
- 👤 Bruce C Brenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:08
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/129; C10M2207/22; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/043; C10M2229/044; C10N; C10N2020/00; C10N2020/01
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
14 words
The lubricant of claim 1 wherein all of the R substituents are methyl radicals.
Claim 2
Dependent Claim
15 words
The lubricant of claim 2 wherein n has a value of from 1 to 10.
Claim 3
Dependent Claim
21 words
The lubricant of claim 3 wherein the R'' substituent is an alkyl radical containing from six to 10 inclusive carbon atoms.
Claim 4
Dependent Claim
13 words
The lubricant of claim 4 wherein the fluid organopolysiloxane is of the formula(CH3)3SiO-C8H17(CH3)SiO-nSi(CH3)3.
Claim 5
Independent Claim
98 words
A method of transmitting power comprising applying pressure to a composition consisting essentially of a. 97 to 99.9 weight percent of an alkylmethylpolysiloxane having a viscosity of from 5 to 100 c.s. as measured at 77* F., said polysiloxane being of the formula R is selected from the group consisting of methyl, phenyl and 2-phenylpropyl radicals, R'' is an alkyl radical containing from six to 10 carbon atoms and n has a value of from 1 to 10; and b. from 0.1 to 3 weight percent dodecenyl succinic acid anhydride; said composition being confined in a hydraulic system.
Claim 6
Dependent Claim
13 words
The method of claim 6 wherein the siloxane is of the formula (CH3)3SiO-C8H17(CH3)SiO-Si(CH3)3.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |