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US3285893A
Expired / Lapsed
US
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Cross linked elastomeric fibers from copolymers of epihalohydrins and ethylenically unsaturated mono-epoxides
Assignee: Hercules LLC
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Filing: 1964-09-17
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Granted: 1966-11-15
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Expires: 1984-09-17
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Vandenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:28
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G65/24; D; D01; D01F; D01F6/00; D01F6/58; D01F6/66
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
AN ELASTOMERIC FIBER COMPRISING A CROSS-LINKED COPOLYMER OF AN EPIHALOHYDRIN AND AT LEAST ONE OTHER EPOXIDE, AT LEAST ONE OF WHICH SAID OTHER EPOXIDE IS ETHYLENICALLY UNSATUREATED EPOXIDE; SAID COPOLYMER BEING A SOLID, AMORPHOUS COPOLYMER HAVING A REDUCED SPECIFIC VISCOSITY OF AT LEAST ABOUT 0.5 WHEN MEASURED AS A 0.1% SOLUTION IN A-CHLORONAPHTHALENE AT 100*C., SAID COPOLYMER BEING ESSENTIALLY A LINEAR POLYMER CONTAINING AT LEAST ABOUT 20% BY WEIGHT OF REPEATING UNITS DERIVED FROM EPIHALOHYDRIN AND AT LEAST ABOUT 00.5% BY WEIGHT OF REPEATING UNITS DERIVED FROM SAID ETHYLENICALLY UNSATURATED EPOXIDE, SAID COPOLYMER HAVING BEEN CROSS-LINKED WITH A SULFUR-CURING AGENT IN THE ABSENCE OF AN AMINE.
Claim 2
Dependent Claim
106 words
AN ELASTOMERIC FIBER COMPRISING A CROSS-LINKED COPOLYMER OF AN EPIHALOHYDRIN AND AT LEAST ONE OTHER EPOXIDE, AT LEAST ONE OF WHICH SAID OTHER EPOXIDE IS ETHYLENICALLY UNSATUREATED EPOXIDE; SAID COPOLYMER BEING A SOLID, AMORPHOUS COPOLYMER HAVING A REDUCED SPECIFIC VISCOSITY OF AT LEAST ABOUT 0.5 WHEN MEASURED AS A 0.1% SOLUTION IN A-CHLORONAPHTHALENE AT 100*C., SAID COPOLYMER BEING ESSENTIALLY A LINEAR POLYMER CONTAINING AT LEAST ABOUT 20% BY WEIGHT OF REPEATING UNITS DERIVED FROM EPIHALOHYDRIN AND AT LEAST ABOUT 00.5% BY WEIGHT OF REPEATING UNITS DERIVED FROM SAID ETHYLENICALLY UNSATURATED EPOXIDE, SAID COPOLYMER HAVING BEEN CROSS-LINKED WITH A SULFUR-CURING AGENT IN THE ABSENCE OF AN AMINE.
Claim 3
Dependent Claim
20 words
AN ELASTOMERIC FIBER IN ACCORDANCE WITH CLAIM I WHEREIN THE ETHYLENICALLY UNSATURATED EPOXIDE IS A GLYCIDYL ETHER HAVING THE FORMULA
Claim 4
Dependent Claim
20 words
AN ELASTOMERIC FIBER IN ACCORDANCE WITH CLAIM 1 WHEREIN THE ETHYLENICALLY UNSATURATED EPOXIDE IS A GLYCIDYL ESTER HAVING THE FORMULA
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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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |