US3242219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of bisphenols
Assignee: Union Carbide Corp
•
Filing: 1957-12-31
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Granted: 1966-03-22
•
Expires: 1977-12-31
Abstract
No abstract record available.
Inventors
- 👤 Alford G Farnham
- 👤 Francis N Apel
- 👤 Howard L Bender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:06
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/20; B; B01; B01J; B01J31/00; B01J31/02; B01J31/06; B01J31/08; B01J31/10; B01J2231/00; B01J2231/30; B01J2231/34; B01J2231/341; B01J2231/347; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR THE PRODUCTION OF BISPHENOLS WHICH INCLUDES THE STEPS OF CONTACTING A MIXTURE OF A PHENOL HAVING A REACTIVE HYDROGEN PARA TO THE PHENOLIC HYDROXYL AND A KETONE HAVING AT LEAST ONE METHYL GROUP ALPHA TO THE CARBONYL, SAID MIXTURE CONTAINING AT LEAST THREE MOLAR PARTS OF SAID PHENOL PER MOLAR PART SAID KETONE, WITH A SUBSTANTIALLY INSOLUBLE CATIONIC-EXCHANGE RESIN WHICH HAS BEEN TREATED SO AS TO BE SUBSTANTIALLY FREE OF WATER, SAID CONTACTING BEING AT A TEMPERATURE BETWEEN ABOUT 40*C. AND 150*C. FOR A TIME SUFFICIENT TO FORM A BISPHENOL BY THE REACTION OF THE SAID PHENOL WITH THE SAID KETONE, AND THEREAFTER RECOVERING THE BISPHENOL FROM THE RESULTING MIXTURE.
Claim 2
Dependent Claim
113 words
A PROCESS FOR THE PRODUCTION OF BISPHENOLS WHICH INCLUDES THE STEPS OF CONTACTING A MIXTURE OF A PHENOL HAVING A REACTIVE HYDROGEN PARA TO THE PHENOLIC HYDROXYL AND A KETONE HAVING AT LEAST ONE METHYL GROUP ALPHA TO THE CARBONYL, SAID MIXTURE CONTAINING AT LEAST THREE MOLAR PARTS OF SAID PHENOL PER MOLAR PART SAID KETONE, WITH A SUBSTANTIALLY INSOLUBLE CATIONIC-EXCHANGE RESIN WHICH HAS BEEN TREATED SO AS TO BE SUBSTANTIALLY FREE OF WATER, SAID CONTACTING BEING AT A TEMPERATURE BETWEEN ABOUT 40*C. AND 150*C. FOR A TIME SUFFICIENT TO FORM A BISPHENOL BY THE REACTION OF THE SAID PHENOL WITH THE SAID KETONE, AND THEREAFTER RECOVERING THE BISPHENOL FROM THE RESULTING MIXTURE.
References Cited (Backward Citations)
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US2468982A
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US2628983A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |