Patent US2383773A successfully refreshed from Google Patents.
Patent US2615007A successfully refreshed from Google Patents.
US2615007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxide resins
Assignee: Celanese Coatings Co
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Filing: 1950-12-08
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Granted: 1952-10-21
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Expires: 1970-12-08
Abstract
No abstract record available.
Inventors
- 👤 Greenlee Sylvan Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:10
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
THE PROCESS OF PRODUCING COMPLEX EPOXIDE RESINS WHICH ARE POLYMERIC POLYETHER DERIVATIVES OF P,P''DIHYDROXYDIPHENYLDIMETHYL METHANE, WHICH COMPRISES REACTING A MIXTURE OF P,P''DIHYDROXYDIPHENYLDIMETHYL METHANE AND EPICHLORHYDRIN, THE MOLAR RATIO OF P,P''DIHYDROXYDIPHENYLDIMETHYL METHANE TO EPICHLORHYDRIN IN SAID MIXTURE BEING BETWEEN 1:1.2 AND 1:1.5, WITH AQUEOUS CAUSTIC SODA SUFFICIENT IN AMOUNT TO COMBINE WITH THE CHLORINE OF THE CHLORHYDRIN, AT LEAST PART OF THE AQUEOUS CAUSTIC SODA BEING PRESENT IN THE INITIAL MIXTURE TO CONVERT THE P,P''DIHYDROXYDIPHENYLDIMETHYL METHANE AT LEAST IN PART INTO ITS SODIUM SALT, THE REACTION BEING CONTINUED WITH HEATING FOR A SUFFICIENT PERIOD OF TIME TO EFFECT SUBSTANTIALLY COMPLETE REACTION OF THE P,P''DIHYDROXYDIPHENYLDIMETHYL METHANE AND EPICHLORHYDRIN TO PRODUCE SOLID, WATER-INSOLUBLE RESINOUS PRODUCTS HAVING, AFTER WASHING WITH WATER, SOFTENING POINTS WITHIN THE RANGE OF FROM ABOUT 84* C. TO ABOUT 112* C. AND WITH AN EPOXIDE EQUIVALENT WITHIN THE RANGE OF FROM ABOUT 591 TO ABOUT 1179.
Claim 2
Dependent Claim
146 words
THE PROCESS OF PRODUCING COMPLEX EPOXIDE RESINS WHICH ARE POLYMERIC POLYETHER DERIVATIVES OF P,P''DIHYDROXYDIPHENYLDIMETHYL METHANE, WHICH COMPRISES REACTING A MIXTURE OF P,P''DIHYDROXYDIPHENYLDIMETHYL METHANE AND EPICHLORHYDRIN, THE MOLAR RATIO OF P,P''DIHYDROXYDIPHENYLDIMETHYL METHANE TO EPICHLORHYDRIN IN SAID MIXTURE BEING BETWEEN 1:1.2 AND 1:1.5, WITH AQUEOUS CAUSTIC SODA SUFFICIENT IN AMOUNT TO COMBINE WITH THE CHLORINE OF THE CHLORHYDRIN, AT LEAST PART OF THE AQUEOUS CAUSTIC SODA BEING PRESENT IN THE INITIAL MIXTURE TO CONVERT THE P,P''DIHYDROXYDIPHENYLDIMETHYL METHANE AT LEAST IN PART INTO ITS SODIUM SALT, THE REACTION BEING CONTINUED WITH HEATING FOR A SUFFICIENT PERIOD OF TIME TO EFFECT SUBSTANTIALLY COMPLETE REACTION OF THE P,P''DIHYDROXYDIPHENYLDIMETHYL METHANE AND EPICHLORHYDRIN TO PRODUCE SOLID, WATER-INSOLUBLE RESINOUS PRODUCTS HAVING, AFTER WASHING WITH WATER, SOFTENING POINTS WITHIN THE RANGE OF FROM ABOUT 84* C. TO ABOUT 112* C. AND WITH AN EPOXIDE EQUIVALENT WITHIN THE RANGE OF FROM ABOUT 591 TO ABOUT 1179.
References Cited (Backward Citations)
GB518057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |