US3285870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of epihalohydrins and glycidyl esters of ethylenically unsaturated acids
Assignee: Hercules LLC
•
Filing: 1964-09-17
•
Granted: 1966-11-15
•
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
2026-11-06 03:30
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G65/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
32 words
A SOLID COPOLYMER OF AN EPIHALOHYDRIN AND AT LEAST ONE OTHER EPOXIDE, AT LEAST ONE OF WHICH OTHER EPOXIDES IS A GLYCIDYL ESTER OF AN ETHYLENICALLY UNSATURATED CARBOXYLIC ACID HAVING THE FORMULA
Claim 2
Dependent Claim
32 words
A SOLID COPOLYMER OF AN EPIHALOHYDRIN AND AT LEAST ONE OTHER EPOXIDE, AT LEAST ONE OF WHICH OTHER EPOXIDES IS A GLYCIDYL ESTER OF AN ETHYLENICALLY UNSATURATED CARBOXYLIC ACID HAVING THE FORMULA
Claim 3
Dependent Claim
62 words
A SOLID COPOLYMER OF EPICHLOROHYDRIN, ETHYLENE OXIDE AND THE GLYCIDYL ESTER OF ROSIN ACID, SAID COPOLYMER BEING A LINEAR POLYETHER WHEREIN POLYMERIZATION IS THROUGH THE EPOXIDE GROUPS, AND CONTAINING AT LAST ABOUT 40% EPICHLOROHYDRIN AND AT LEAST ABOUT 2% OF SAID GLYCIDYL ESTER AND HAVING A REDUCED SPECIFIC VISCOSITY OF AT LEAST 0.1 AS MEASURED ON A 0.1% IN A-CHLORONAPHTHALENE AT 100*C.
Claim 4
Dependent Claim
62 words
A SOLID COPOLYMER OF EPICHLOROHYDRIN, ETHYLENE OXIDE AND THE GLYCIDYL ESTER OF ROSIN ACID, SAID COPOLYMER BEING A LINEAR POLYETHER WHEREIN POLYMERIZATION IS THROUGH THE EPOXIDE GROUPS, AND CONTAINING AT LAST ABOUT 40% EPICHLOROHYDRIN AND AT LEAST ABOUT 2% OF SAID GLYCIDYL ESTER AND HAVING A REDUCED SPECIFIC VISCOSITY OF AT LEAST 0.1 AS MEASURED ON A 0.1% IN A-CHLORONAPHTHALENE AT 100*C.
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) | 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 |