US3285991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyepoxides cured with the reaction product of a dihydroxydiphenylsul-fone, an amine, and an aldehyde
Assignee: Union Carbide Corp
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Filing: 1963-03-26
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Granted: 1966-11-15
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Expires: 1983-03-26
Abstract
No abstract record available.
Inventors
- 👤 Ralph F Sellers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:47
CPC Classifications
C; C08; C08L; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A CURABLE POLYEPOXIDE COMPOSITION COMPRISING A POLYEPOXIDE HAVING AN OXIRANE EPOXY EQUIVALENCY OF GREATER THAN ONE, A HARDENER FOR SAID POLYEPOXIDE, AND A CATALYTIC AMOUNT OF A BASE HAVING THE FORMULA:
Claim 2
Dependent Claim
31 words
A CURABLE POLYEPOXIDE COMPOSITION COMPRISING A POLYEPOXIDE HAVING AN OXIRANE EPOXY EQUIVALENCY OF GREATER THAN ONE, A HARDENER FOR SAID POLYEPOXIDE, AND A CATALYTIC AMOUNT OF A BASE HAVING THE FORMULA:
References Cited (Backward Citations)
No citation records indexed.
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 |