US3158591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of epihalohydrins and ethylenically unsaturated epoxides
Assignee: Hercules Powder Co
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Filing: 1960-01-26
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Granted: 1964-11-24
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Expires: 1980-01-26
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Vandeuberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:19
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G65/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A SOLID COPOLYMER OF AN EPIHALOHYDRIN AND AT LEAST ONE OTHER EPOXIDE, AT LEAST ONE OF WHICH SAID OTHER EPOXIDE IS AN ETHYLENICALLY UNSATURATED EPOXIDE SELECTED FROM THE GROUP CONSISTING OF ETHYLENICALLY UNSATURATED GLYCIDYL ETHERS AND MONOEPOXIDES OF POLYENES, SAID COPOLYMER BEING ESSENTIALLY A LINEAR POLYETHER HAVING REPEATING UNITS DERIVED ONLY FROM SAID EPIHALOHYDRIN AND EPOXIDES, AND HAVING A REDUCED SPECIFIC VISCOSITY OF AT LEAST ABOUT 0.2 WHEN MEASURED AS A 0.1% SOLUTION IN A-CHLORONAPHTHALENE AT 100*C., SAID COPOLYMER CONTAINING AT LEAST ABOUT 5% BY WEIGHT OF REPEATING UNITS DERIVED OF REPEATING UNITS DERIVED FROM SAID ETHYLENICALLY UNSATURATED EPOXIDES.
Claim 2
Dependent Claim
99 words
A SOLID COPOLYMER OF AN EPIHALOHYDRIN AND AT LEAST ONE OTHER EPOXIDE, AT LEAST ONE OF WHICH SAID OTHER EPOXIDE IS AN ETHYLENICALLY UNSATURATED EPOXIDE SELECTED FROM THE GROUP CONSISTING OF ETHYLENICALLY UNSATURATED GLYCIDYL ETHERS AND MONOEPOXIDES OF POLYENES, SAID COPOLYMER BEING ESSENTIALLY A LINEAR POLYETHER HAVING REPEATING UNITS DERIVED ONLY FROM SAID EPIHALOHYDRIN AND EPOXIDES, AND HAVING A REDUCED SPECIFIC VISCOSITY OF AT LEAST ABOUT 0.2 WHEN MEASURED AS A 0.1% SOLUTION IN A-CHLORONAPHTHALENE AT 100*C., SAID COPOLYMER CONTAINING AT LEAST ABOUT 5% BY WEIGHT OF REPEATING UNITS DERIVED OF REPEATING UNITS DERIVED FROM SAID ETHYLENICALLY UNSATURATED EPOXIDES.
References Cited (Backward Citations)
US2470324A
Cited
US2476922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |