Patent US2864805A successfully refreshed from Google Patents.
US2864805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxide resins
Assignee: Celanese Coatings Co
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Filing: 1955-12-05
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Granted: 1958-12-16
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Expires: 1975-12-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Harold G Cooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:44
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
THE METHOD OF PRODUCING EPOXIDE RESINS WHICH COMPRISES REACTING A MIXTURE OF CYANURIC ACID AND A DIHYDRIC PHENOL WITH EPICHLORHYDRIN IN THE PRESENCE OF AN ORGANIC NITROGEN BASE AS A CATALYST AND AN ORGANIC SOLVENT FOR CYANURIC ACID TO FORM POLYCHLORHYDRIN DERIVATIVES, AND SUBJECTING THE RESULTING CHLORHYDRIN DERIVATIVES TO DEHYDROHALOGENATION TO FORM EPOXIDE RESINS.
Claim 2
Independent Claim
54 words
THE METHOD OF PRODUCING EPOXIDE RESINS WHICH COMPRISES REACTING A MIXTURE OF CYANURIC ACID AND A DIHYDRIC PHENOL WITH EPICHLORHYDRIN IN THE PRESENCE OF AN ORGANIC NITROGEN BASE AS A CATALYST AND AN ORGANIC SOLVENT FOR CYANURIC ACID TO FORM POLYCHLORHYDRIN DERIVATIVES, AND SUBJECTING THE RESULTING CHLORHYDRIN DERIVATIVES TO DEHYDROHALOGENATION TO FORM EPOXIDE RESINS.
References Cited (Backward Citations)
US2741607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |