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Patent US3758541A successfully refreshed from Google Patents.
US3758541A
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Organosilicon compounds
Assignee: Midland Silicones Ltd
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Filing: 1972-05-19
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Granted: 1973-09-11
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Expires: 1992-05-19
Abstract
Abstract Organosilicon compounds, polymers and copolymers have been prepared containing acetylenic linkages between adjacent silicon atoms. The basic compounds are defined by the general formula R''(R2Si)m(O*C)-(C*C) (SiR2)nR'''' where R'' and R'''' are each H, halogen, hydrocarbonoxy or -NQ2 as above defined, monovalent hydrocarbon or monovalent halogenohydrocarbon, m is 1 to 4, n is 0 to 4, R'''' being H, alkyl, aryl or trihydrocarbylsilyl when n is 0. The polymers can be defined by the unit formula (OSiR2-C*CC*C-SiR2-) and may be copolymers containing units of the formula QaSiO4 a/2 where Q is monovalent hydrocarbon or halogenohydrocarbon and a is 0 to 3.
Inventors
- 👤 G Chandra
- 👤 W Owen
- 👤 N Lloyd
- 👤 B Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:15
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G77/50; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0836; C07F7/0838; C07F7/0896; C07F7/10; C07F7/12; C07F7/18; C07F7/1804
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
14 words
Organosilicon compounds as claimed in claim 1 wherein m and n are each 1.
Claim 2
Dependent Claim
18 words
Organosilicon compounds as claimed in claim 1 wherein each R represents a methyl radical or a phenyl radical.
Claim 3
Dependent Claim
3 words
The compound bis(dimethylchlorosilyl)diacetylene.
Claim 4
Dependent Claim
3 words
The compound bis(methoxydimethylsilyl)diacetylene.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |