US3787508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid,curable polyepoxides modified with hydrolyzed liquid polyepoxides
Assignee: Dow Chemical Co
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Filing: 1971-04-01
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Granted: 1974-01-22
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Expires: 1991-04-01
Abstract
Abstract A SOLID CURABLE POLYEPOXIDE IS RENDERED OF GREATER REACTIVITY TO CURING AND ESTERIFICATION, WHILE MAINTAINING ITS OTHER DESIRABLE PROPERTIES BY THE ADDITION THERETO OF MINOR AMOUNTS OF HYDROLYZED OR PARTIALLY HYDROLYZED EPOXIDE PRODUCT, OR BY PREPARING A SOLID CURABLE POLYEPOXIDE FROM A LIQUID EPOXY RESIN BY REACTING THE LIQUID RESIN WITH A DIPHENOLIC COMPOUND AND A CATALYST IN THE PRESENCE OF SAID HYDROLYZED PRODUCT.
Inventors
- 👤 E Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:07
CPC Classifications
C; C08; C08L; C08L63/00; C08G; C08G59/00; C08G59/14; C08G59/1405; C08G59/1427; C08G59/18; C08G59/40; C08G59/42; C08G59/4207; C08G59/62; C09; C09D; C09D163/00
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |