Patent US3699064A successfully refreshed from Google Patents.
US3699064A
Expired / Lapsed
US
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Carboxylic curing agent
Assignee: Sherwin Williams Co
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Filing: 1970-12-14
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Granted: 1972-10-17
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Expires: 1990-12-14
Abstract
Abstract A POLYCARBOXYLIC CURING AGENT SOLUBLE IN PARAFFINIC HYDROCARBON SOLVENTS, PARTICULARLY SUITABLE AS CURING AGENTS FOR EPOXIDE RESINS, OBTAINED BY SIMULTANEOUSLY REACTING A POLYOL HAVING FROM 3 TO ABOUT 6 HYDROXYL GROUPS WITH A CYCLIC ACID ANHYDRIDE, AND AN OLEFIN OXIDE WITH AT LEAST 10 SERIALLY LINKED CARBON ATOMS HAVING AN OXIRANE FUNCTIONALITY OF FROM 1 TO ABOUT 1.5.
Inventors
- 👤 Arthur L Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:58
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/56; C08G63/58; C08G63/40; C08G63/42; C08L; C08L63/00
Claims Analysis
Total Claims: 0
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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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |