US3308094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for curing polyepoxides
Assignee: Wyeth Holdings LLC
•
Filing: 1962-11-08
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Granted: 1967-03-07
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Expires: 1982-11-08
Abstract
No abstract record available.
Inventors
- 👤 Allan E Sherr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:28
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/686
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A COMPOSITION COMPRISING (A) AN ORGANIC RESIN FORMING POLYEPOXIDE COMPOUND SELECTED FROM THE GROUP CONSISTING OF MONOMERIC AND POLYMERIC EPOXIDES HAVING A PLURALITY OF REACTIVE 1,2-EPOXY GROUPS, AND AN EPOXIDE EQUIVALENCY OF AT LEAST 1.0 AND (B) A CATALYTIC AMOUNT OF A GUANIDINE REPRESENTED BY THE GENERAL FORMULA:
Claim 2
Dependent Claim
48 words
A COMPOSITION COMPRISING (A) AN ORGANIC RESIN FORMING POLYEPOXIDE COMPOUND SELECTED FROM THE GROUP CONSISTING OF MONOMERIC AND POLYMERIC EPOXIDES HAVING A PLURALITY OF REACTIVE 1,2-EPOXY GROUPS, AND AN EPOXIDE EQUIVALENCY OF AT LEAST 1.0 AND (B) A CATALYTIC AMOUNT OF A GUANIDINE REPRESENTED BY THE GENERAL FORMULA:
References Cited (Backward Citations)
US3028342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |