US3671429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grease-like silicone compound
Assignee: General Electric Co
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Filing: 1969-09-25
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Granted: 1972-06-20
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Expires: 1989-09-25
Abstract
Abstract Grease-like compositions consisting of (1) 100 parts of a liquid organopolysiloxane having a viscosity of from 50 to 200,000 centistokes at 25* C., (2) from 17 to 300 parts of finely divided zinc oxide, and (3) from about 17 to 300 parts of finely divided polytetrafluoroethylene. The material is useful, particularly, in electrical switch gear.
Inventors
- 👤 John H Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:12
CPC Classifications
C; C10; C10M; C10M7/00; C10M2201/00; C10M2201/06; C10M2201/062; C10M2209/00; C10M2209/02; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/107; C10M2211/00; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10M2227/00; C10M2227/06; C10M2227/061; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/042; C10M2229/043; C10M2229/044; C10M2229/05; C10M2229/051; C10M2229/052; C10N; C10N2050/00; C10N2050/08; C10N2050/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
36 words
The composition of claim 1 wherein the finely divided zinc oxide is employed in amounts of from 60 to 167 parts and the finely divided polytetrafluoroethylene is employed in amounts of from 20 to 100 parts.
Claim 2
Dependent Claim
12 words
from about 17 to 300 parts of finely divided zinc oxide, and
Claim 3
Dependent Claim
10 words
from about 17 to 300 parts of finely divided polytetrafluoroethylene.
Claim 4
Dependent Claim
22 words
The organopolysiloxane of claim 1 in which the finely divided polytetrafluoroethylene has an average particle size no greater than about 100 microns.
Claim 5
Dependent Claim
11 words
The organopolysiloxane composition of claim 1 in which R is methyl.
Claim 6
Dependent Claim
23 words
The organopolysiloxane composition of Claim 1 in which the mean average particle size of the finely divided zinc oxide is approximately 0.3 micron.
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 |