US4020265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyacetylene tetrapolymers
Assignee: General Electric Co
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Filing: 1973-12-17
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Granted: 1977-04-26
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Expires: 1993-12-17
Abstract
Abstract Certain polyacetylenes are provided having chemically combined ether linkages, or alkylene linkages and mixtures thereof, exhibiting improved compatability with various organic plasticizers. The polyacetylenes have been found to be melt extrudable, and convertible to carbonaceous films and molded carbon objects.
Inventors
- 👤 Dwain M. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:53
CPC Classifications
C; C08; C08F; C08F38/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
Polyacetylene tetrapolymers consisting essentially of from about 5% by weight of acetylene units and 95% by weight of a mixture of units consisting essentially of 74 to 86 mole percent of meta-diethynylbenzene units, 4 to 9 mole percent of para-diethynylbenzene units and 5 to 15 mole percent of diethynylalkane units, where the sum of the units in said mixture of units is 100 mole percent.
Claim 2
Dependent Claim
65 words
Polyacetylene tetrapolymers consisting essentially of from about 5% by weight of acetylene units and 95% by weight of a mixture of units consisting essentially of 74 to 86 mole percent of meta-diethynylbenzene units, 4 to 9 mole percent of para-diethynylbenzene units and 5 to 15 mole percent of diethynylalkane units, where the sum of the units in said mixture of units is 100 mole percent.
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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |