US2668807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxide compositions
Assignee: Celanese Coatings Co
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Filing: 1952-04-08
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Granted: 1954-02-09
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Expires: 1972-04-08
Abstract
No abstract record available.
Inventors
- 👤 Greenlee Sylvan Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:49
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08G59/02; C08G59/04; C08G59/06; C08G59/066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE TWO STEP PROCESS OF MAKING HIGH MELTING POINT RESINS AND FINAL INFUSIBLE PRODUCTS WHICH COMPRISES FIRST REACTING A DIHYDRICPHENOL FREE FROM REACTIVE GROUPS OTHER THAN PHENOLIC HYDROXYL GROUPS WITH AN EXCESS OF AN ALIPHATIC POLYEPOXIDE FREE FROM REACTIVE GROUPS OTHER THAN EPOXIDE AND ALCOHOLIC HYDROXYL GROUPS TO FORM A REACTION PRODUCT HAVING TERMINAL EPOXIDE GROUPS AND FURTHER REACTING THIS PRODUCT WITH A FURTHER AMOUNT OF SUCH A DIHYDRICPHENOL.
Claim 2
Dependent Claim
69 words
THE TWO STEP PROCESS OF MAKING HIGH MELTING POINT RESINS AND FINAL INFUSIBLE PRODUCTS WHICH COMPRISES FIRST REACTING A DIHYDRICPHENOL FREE FROM REACTIVE GROUPS OTHER THAN PHENOLIC HYDROXYL GROUPS WITH AN EXCESS OF AN ALIPHATIC POLYEPOXIDE FREE FROM REACTIVE GROUPS OTHER THAN EPOXIDE AND ALCOHOLIC HYDROXYL GROUPS TO FORM A REACTION PRODUCT HAVING TERMINAL EPOXIDE GROUPS AND FURTHER REACTING THIS PRODUCT WITH A FURTHER AMOUNT OF SUCH A DIHYDRICPHENOL.
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) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |