US3760030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple sequence block copolymers of silicones and styrene
Assignee: General Electric Co
•
Filing: 1971-06-02
•
Granted: 1973-09-18
•
Expires: 1991-06-02
Abstract
Abstract Multiple sequence block copolymers of silicone and styrene having the formula: (1) (ABA)x ARE PRODUCED, WHERE A represents repeating diorganosiloxy units and B represents a polystyrene chain. This ABA chain is repeated from three to 10 times. The materials have high elongation and tensile strength and are useful in the formation of strong, elastic films.
Inventors
- 👤 J Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:47
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/442; C08F; C08F297/00; C08F297/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
28 words
The multiple sequence, block copolymer of claim 1 wherein a is from 25 to 500, b is from 50 to 500 and x is from three to 10.
Claim 2
Dependent Claim
12 words
The multiple sequence, block copolymer of claim 1 wherein R is methyl.
Claim 3
Dependent Claim
12 words
The multiple sequence, block copolymer of claim 1 wherein R is phenyl.
Claim 4
Dependent Claim
12 words
A film formed from the multiple sequence, block copolymer of claim 2.
Claim 5
Dependent Claim
12 words
A multiple sequence, block copolymer of polystyrene and polydiorganosiloxane of the formula,
Claim 6
Dependent Claim
28 words
The multiple sequence, block copolymer of claim 6 wherein a is from 25 to 500, b is from 50 to 500 and x is from three to 10.
Claim 7
Dependent Claim
16 words
The multiple sequence, block copolymer of claim 6 wherein R is methyl and R'' is phenyl.
Claim 8
Dependent Claim
12 words
A film formed from the multiple sequence, block copolymer of claim 6.
Claim 9
Dependent Claim
9 words
A process for forming a polymer of the formula,
Claim 10
Dependent Claim
9 words
The process of claim 10 wherein R is methyl.
Claim 11
Dependent Claim
9 words
A process for forming a polymer of the formula,
Claim 12
Dependent Claim
13 words
The process of claim 12 wherein R is methyl and R'' is phenyl.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |