Patent US2532014A successfully refreshed from Google Patents.
US3051681A
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US
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Process for inhibiting crystallization of the diglycidyl ether of bisphenol a comprising incorporating therein an epoxylated novolak resin, and composition obtained thereby
Assignee: Dow Chemical Co
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Filing: 1959-10-29
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Granted: 1962-08-28
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Expires: 1979-10-29
Abstract
No abstract record available.
Inventors
- 👤 Alexander M Partansky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:30
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
AN EPOXY RESIN COMPOSITION CONSISTING ESSENTIALLY OF THE DIGLYCIDYL ETHER OF 2,2-BIS(4-HYDROXYPHENY) PROPANE AND A MINOR PROPORTION, SUFFICIENT TO INHIBIT CRYSTALLIZATION, OF AN EPOXYLATED NOVOLAK RESIN, SAID NOVOLAK RESIN, BEFORE EPOXYLATION, CONTAINING 2 TO 5 PHENOLIC GROUPS AND CONSISTING PREDOMINANTLY OF METHYLENEBISPHENOL.
Claim 2
Dependent Claim
42 words
AN EPOXY RESIN COMPOSITION CONSISTING ESSENTIALLY OF THE DIGLYCIDYL ETHER OF 2,2-BIS(4-HYDROXYPHENY) PROPANE AND A MINOR PROPORTION, SUFFICIENT TO INHIBIT CRYSTALLIZATION, OF AN EPOXYLATED NOVOLAK RESIN, SAID NOVOLAK RESIN, BEFORE EPOXYLATION, CONTAINING 2 TO 5 PHENOLIC GROUPS AND CONSISTING PREDOMINANTLY OF METHYLENEBISPHENOL.
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) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |