Patent US3994948A successfully refreshed from Google Patents.
US3994948A
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US
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Hydraulic fluids
Assignee: Castrol Ltd
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Filing: 1974-09-24
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Granted: 1976-11-30
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Expires: 1994-09-24
Abstract
Abstract Novel glycol-substituted alkyl silanes useful as components of hydraulic fluids have the general formula: ##EQU1## wherein R, R 1 , R 4 and R 5 are specified substituents. Hydraulic fluids containing the glycol-substituted alkyl silanes are also described.
Inventors
- 👤 Gerald John Joseph Jayne
- 👤 Herbert Frank Askew
- 👤 Colin John Harrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:30
CPC Classifications
C; C10; C10M; C10M3/00; C10M2201/00; C10M2201/08; C10M2201/081; C10M2201/082; C10M2201/084; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/04; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/125; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/288; C10M2207/30; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/10; C10M2209/102; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/107; C10M2209/108; C10M2209/109; C10M2209/11; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/044; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/06; C10M2219/00; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2227/00; C10M2227/04; C10M2227/06; C10M2227/061; C10M2227/062; C10N; C10N2010/00; C10N2010/02; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
117 words
Alkyl silane derivatives prepared by the process comprising reacting a di- or tri-chlorosilane of the formula: ##EQU2## with a diol or polyol of the formula HO--R 4 --OH and a glycol monoether of the formula: ##EQU3## wherein a. R is an alkyl group; b. the or each group R 2 is a hydrogen atom or a methyl or ethyl group and each R 2 may be the same as or different from any other group R 2 ; c. R 3 is an alkyl group; d. R 4 is the residue of a diol or polyol; e. n is an integer of from 1 to 10; and f. X is a chlorine atom or the group R.
Claim 2
Dependent Claim
117 words
Alkyl silane derivatives prepared by the process comprising reacting a di- or tri-chlorosilane of the formula: ##EQU2## with a diol or polyol of the formula HO--R 4 --OH and a glycol monoether of the formula: ##EQU3## wherein a. R is an alkyl group; b. the or each group R 2 is a hydrogen atom or a methyl or ethyl group and each R 2 may be the same as or different from any other group R 2 ; c. R 3 is an alkyl group; d. R 4 is the residue of a diol or polyol; e. n is an integer of from 1 to 10; and f. X is a chlorine atom or the group R.
Claim 3
Dependent Claim
33 words
Alkyl silane derivatives as claimed in claim 1 wherein the reaction of the di- or tri-chlorosilane with the diol or polyol and glycol monoether is carried out simultaneously in a single stage reaction.
Claim 4
Dependent Claim
32 words
Alkyl saline derivatives as claimed in claim 1 wherein the reaction of the di- or tri-chlorosilane with the diol or polyol and glycol monoether is carried out as a two stage reaction.
Claim 5
Dependent Claim
26 words
Alkyl silane derivatives as claimed in claim 3 wherein the first stage reaction is the reaction of the di- or tri-chlorosilane with the diol or polyol.
Claim 6
Dependent Claim
26 words
Alkyl silane derivatives as claimed in claim 1 wherein the reaction is carried out in the presence of an acid acceptor to neutralize liberated hydrogen chloride.
Claim 7
Dependent Claim
22 words
Alkyl saline derivatives as claimed in claim 1 wherein the di- or tri-chlorosilane is reacted with a glycol or a dihydroxy benzene.
Claim 8
Dependent Claim
18 words
Alkyl silane derivatives as claimed in claim 6 wherein the di- or tri-chlorosilane is reacted with neopentyl glycol.
Claim 9
Dependent Claim
24 words
Alkyl silane derivatives as claimed in claim 1 wherein the di- or tri-chlorosilane is reacted with trimethylol propane, pentaerythritol, dipentaerythritol or a tri-hydroxy benzene.
Claim 10
Dependent Claim
30 words
Alkyl silane derivatives as claimed in claim 1 wherein a dialkyl dichlorosilane is reacted with a glycol of the formula HO --CH--CH 2 --O-- n H and the glycol monoether.
Claim 11
Dependent Claim
33 words
Alkyl silane derivatives as claimed in claim 1 wherein an alkyl trichlorosilane is reacted with a glycol of the formula HO --CH 2 --CH 2 --O -- n H and the glycol monoether.
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) | 1979-11-30 | 1980-05-31 | 1980-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-30 | 1984-05-31 | 1984-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-30 | 1988-05-31 | 1988-11-30 | $7700.00 | Window Closed / Lapsed |