US3977986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone-base fire resistant hydraulic fluid
Assignee: United States Department of the Navy
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Filing: 1975-06-02
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Granted: 1976-08-31
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Expires: 1995-06-02
Abstract
Abstract A fire resistant silicone-base hydraulic fluid having improved antiwear properties comprising tetrachlorophenylmethyl silicone fluid, dibutylchlorendate and 2,5-bis-alkyl-dithio-1, 3, 4 thiadiazole.
Inventors
- 👤 Alfeo A. Conte, Jr.
- 👤 J. Lee Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:38
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/04; C10M107/00; C10M107/50; C10M131/00; C10M131/08; C10M131/12; C10M135/00; C10M135/32; C10M135/36; C10M2211/00; C10M2211/04; C10M2211/044; C10M2219/00; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10M2219/108; C10M2229/00; C10M2229/02; C10M2229/025; C10M2229/04; C10M2229/0405; C10M2229/041; C10M2229/0415; C10M2229/042; C10M2229/0425; C10M2229/043; C10M2229/0435; C10M2229/044; C10M2229/0445; C10M2229/045; C10M2229/0455; C10M2229/046; C10M2229/0465; C10M2229/047; C10M2229/0475; C10M2229/048; C10M2229/0485; C10M2229/05; C10M2229/0505; C10M2229/051; C10M2229/0515; C10M2229/052; C10M2229/0525; C10M2229/053; C10M2229/0535; C10M2229/054; C10M2229/0545; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
74 words
A silicone base fluid having improved lubricity characteristics comprising: a major amount of a tetrachlorophenylmethyl silicone fluid defined by the formula ##EQU1## wherein the tetrachlorophenyl siloxane and the dimethyl siloxane moieties are present in amounts of 12.5 and 87.5 weight percents, respectively; an amount in the range of from 0.1 to 0.4 percent by weight of 2,5-bis-alkyl-dithio-1,3,4 thiadiazole; and an amount in the range of from 1.0 to 3.0 percent by weight of dibutylchlorendate.
Claim 2
Dependent Claim
74 words
A silicone base fluid having improved lubricity characteristics comprising: a major amount of a tetrachlorophenylmethyl silicone fluid defined by the formula ##EQU1## wherein the tetrachlorophenyl siloxane and the dimethyl siloxane moieties are present in amounts of 12.5 and 87.5 weight percents, respectively; an amount in the range of from 0.1 to 0.4 percent by weight of 2,5-bis-alkyl-dithio-1,3,4 thiadiazole; and an amount in the range of from 1.0 to 3.0 percent by weight of dibutylchlorendate.
Claim 3
Dependent Claim
24 words
A silicone base fluid according to claim 1 wherein said alkyl thiadiazole is selected from the group consisting of t-hexadecyl, n-octyl and t-dodecyl thiadiazole.
Claim 4
Dependent Claim
57 words
A silicone base fluid having improved lubricity characteristics comprising: substantially 97.75 weight percent of a tetrachlorophenylmethyl silicone fluid defined by the formula ##STR4## wherein the tetrachlorophenyl siloxane and the dimethyl siloxane moieties are present in amounts of 12.5 and 87.5 weight percents, respectively; substantially 2.0 weight percent dibutylchlorendate; and substantially 0.25 weight percent 2,5 bis-t-dodecyl dithio-1,3,4 thiadiazole.
Claim 5
Dependent Claim
57 words
A silicone base fluid having improved lubricity characteristics comprising: substantially 97.75 weight percent of a tetrachlorophenylmethyl silicone fluid defined by the formula ##STR4## wherein the tetrachlorophenyl siloxane and the dimethyl siloxane moieties are present in amounts of 12.5 and 87.5 weight percents, respectively; substantially 2.0 weight percent dibutylchlorendate; and substantially 0.25 weight percent 2,5 bis-t-dodecyl dithio-1,3,4 thiadiazole.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |