US3865859A
Expired / Lapsed
US
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Organo-silicon compounds
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1972-08-24
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Granted: 1975-02-11
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Expires: 1992-08-24
Abstract
Abstract New siloxyalkylene polymers prepared by reacting organochlorosilanes or alkoxysilanes with alkylene or oxyalkylene diols and which are useful as surface active agents particularly for suppression of foam formation in aqueous systems e.g., in fermentation processes.
Inventors
- 👤 John Beckett Plumb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:50
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/04; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0409; C07F7/08; C07F7/18; C07F7/1804
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
6 words
ORGANOSILICON COMPOUNDS OF THE GENERAL FORMULA
Claim 2
Dependent Claim
6 words
ORGANOSILICON COMPOUNDS OF THE GENERAL FORMULA
Claim 3
Dependent Claim
16 words
Compounds according to claim 1 wherein the group R contains not more than 10 carbon atoms.
Claim 4
Dependent Claim
20 words
Compounds according to claim 2 wherein the group R is selected from the group consisting of methyl and phenyl groups.
Claim 5
Dependent Claim
12 words
Compounds according to claim 1 wherein z is not less than x.
Claim 6
Dependent Claim
34 words
A process for the production of compounds claimed in claim 1 comprising reacting a silicon halide selected from the group consisting of silicon tetrachloride and organotrichlorosilanes of the formula RSiCl3 with a dihydroxy compound.
Claim 7
Dependent Claim
27 words
A process for the production of compounds claimed in claim 1 comprising transesterifying an alkoxysilane selected from the group consisting of tetraalkoxysilanes, organotrialkoxysilanes with a dihydroxy compound.
Claim 8
Dependent Claim
28 words
A process according to claim 6 wherein the alkoxy groups are so chosen that the free alcohol produced is of lower boiling point than the dihydroxy compound used.
Claim 9
Dependent Claim
49 words
A process according to claim 6 wherein the alkoxysilanes selected from the group consisting of alkoxysilanes of the formula Si(OR'')4 and RSi(OR'')3 where R'' is selected from the group consisting of methyl, ethyl, isopropyl, n-butyl groups and R is selected from the group consisting of meThyl and phenyl groups.
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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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |