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Patent US3051684A successfully refreshed from Google Patents.
US3051684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organosiloxane polymers containing polydiene blocks
Assignee: University of Akron
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Filing: 1959-03-26
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Granted: 1962-08-28
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Expires: 1979-03-26
Abstract
No abstract record available.
Inventors
- 👤 Morton Maurice
- 👤 Rembaum Alan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:00
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/10; C08G; C08G77/00; C08G77/42; C08G77/442
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A LINEAR BLCOK COPOLYMER PRODUCED BY ANIONIC POLYMERIZATION, EACH OF THE TWO TERMINAL SEGMENTS OF WHICH COPOLYMER IS A DI-FUNCTIONAL POLYORGANOSILOXANE SEGMENT, THE COPOLYMER HAVING AT LEAST ONE SULFUR-VULCANIZABLE POLYDIENE INTERMEDIATE SEGEMENT OF THE CLASS CONSISTING OF POLYMERS OF CONJUGATED DIOLEFIN HYDROCARBONS AND CHLOROHYDROCARBONS, AND CONTAINING SUFFICIENT DIENE CONTENT TO PERMIT VULCANIZATION AND SUFFICIENT POLYORGANOSILOXANE CONTENT TO MODIFY THE PROPERTIES OF THE COPOLYMER, AND WHERE THERE IS MORE THAN ONE POLYDIENE SEGEMENT EACH TWO SUCH SEGMENTS ARE SEPARATED BY A POLYMER OF A MONOMER POLYMERIZABLE BY CARBANION.
Claim 2
Dependent Claim
87 words
A LINEAR BLCOK COPOLYMER PRODUCED BY ANIONIC POLYMERIZATION, EACH OF THE TWO TERMINAL SEGMENTS OF WHICH COPOLYMER IS A DI-FUNCTIONAL POLYORGANOSILOXANE SEGMENT, THE COPOLYMER HAVING AT LEAST ONE SULFUR-VULCANIZABLE POLYDIENE INTERMEDIATE SEGEMENT OF THE CLASS CONSISTING OF POLYMERS OF CONJUGATED DIOLEFIN HYDROCARBONS AND CHLOROHYDROCARBONS, AND CONTAINING SUFFICIENT DIENE CONTENT TO PERMIT VULCANIZATION AND SUFFICIENT POLYORGANOSILOXANE CONTENT TO MODIFY THE PROPERTIES OF THE COPOLYMER, AND WHERE THERE IS MORE THAN ONE POLYDIENE SEGEMENT EACH TWO SUCH SEGMENTS ARE SEPARATED BY A POLYMER OF A MONOMER POLYMERIZABLE BY CARBANION.
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) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |