US2892809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resins
Assignee: Beazer East Inc
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Filing: 1955-11-10
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Granted: 1959-06-30
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Expires: 1975-11-10
Abstract
No abstract record available.
Inventors
- 👤 Clair William E St
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:48
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/063; C08G59/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
METHOD OF MAKING SUBSTANTIALLY COMPLETELY ETHERIFIED VICINAL-TYPE EPOXY RESINS COMPRISING DISSOLVING A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF (A) A NOVOLAK RESIN COMPRISING A CONDENSATION PRODUCT OF FORMALDEHYDE AND A PHENOLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHENOL, CRESOL AND RESORCINOL AND (B) A MIXTURE OF SAID CONDENSATION PRODUCT AND A PHENOLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHENOL, CRESOL AND RESORCINOL, IN A QUANTITY OF HALOEPOXYALKANE IN EXCESS OF THAT REQUIRED FOR COMPLETE ETHERIFICATION, HEATING THE RESULTING SOLUTION TO A TEMPERATURE OF AT LEAST ABOUT 60*C. AND BELOW THE DECOMPOSITION TEMPERATURE OF SAID HALOEPOXYALKANE, ADDING GRADUALLY THERETO AN ALKALI METAL HYDROXIDE DISSOLVED IN A MONOHYDRIC ALIPHATIC ALCOHOL HAVING LESS THAN 5 CARBON ATOMS, THE MOLECULAR AMOUNT OF SAID ALKALI METAL HYROXIDE ADDED BEING SUBSTANTIALLY EQUIVALENT TO THE NUMBER O HYDROXYL GROUPS TO BE ETHERIFIED, AND RECOVERING SAID VICINAL-TYPE EPOXY RESIN.
Claim 2
Dependent Claim
144 words
METHOD OF MAKING SUBSTANTIALLY COMPLETELY ETHERIFIED VICINAL-TYPE EPOXY RESINS COMPRISING DISSOLVING A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF (A) A NOVOLAK RESIN COMPRISING A CONDENSATION PRODUCT OF FORMALDEHYDE AND A PHENOLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHENOL, CRESOL AND RESORCINOL AND (B) A MIXTURE OF SAID CONDENSATION PRODUCT AND A PHENOLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHENOL, CRESOL AND RESORCINOL, IN A QUANTITY OF HALOEPOXYALKANE IN EXCESS OF THAT REQUIRED FOR COMPLETE ETHERIFICATION, HEATING THE RESULTING SOLUTION TO A TEMPERATURE OF AT LEAST ABOUT 60*C. AND BELOW THE DECOMPOSITION TEMPERATURE OF SAID HALOEPOXYALKANE, ADDING GRADUALLY THERETO AN ALKALI METAL HYDROXIDE DISSOLVED IN A MONOHYDRIC ALIPHATIC ALCOHOL HAVING LESS THAN 5 CARBON ATOMS, THE MOLECULAR AMOUNT OF SAID ALKALI METAL HYROXIDE ADDED BEING SUBSTANTIALLY EQUIVALENT TO THE NUMBER O HYDROXYL GROUPS TO BE ETHERIFIED, AND RECOVERING SAID VICINAL-TYPE EPOXY RESIN.
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) | 1962-06-29 | 1962-12-29 | 1963-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-29 | 1966-12-29 | 1967-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-29 | 1970-12-29 | 1971-06-30 | $7700.00 | Window Closed / Lapsed |