Patent US2936272A successfully refreshed from Google Patents.
US2936272A
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Bisphenols
Assignee: Union Carbide Corp
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Filing: 1956-08-24
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Granted: 1960-05-10
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Expires: 1976-08-24
Abstract
No abstract record available.
Inventors
- 👤 Howard L Bender
- 👤 Francis N Apel
- 👤 Jr Louis B Conte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:52
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/20; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
PROCESS FOR PRODUCING BISPHENOLS, WHICH COMPRISES PREPARING A REACTIVE MIXTURE OF A MONOCYCLIC MONOHYDRIC PHENOL, A KETONE FREE OF ALIPHATIC CARBON-TO-CARBON DOUBLE BONDS, AND ACIDIC CONDENSATION AGENT AND IRRADIATING THE MIXTURE WITH ULTRAVIOLET RAYS TO CAUSE SAID REACTANTS TO REACT AND PRODUCE BISPHENOLS.
Claim 2
Dependent Claim
43 words
PROCESS FOR PRODUCING BISPHENOLS, WHICH COMPRISES PREPARING A REACTIVE MIXTURE OF A MONOCYCLIC MONOHYDRIC PHENOL, A KETONE FREE OF ALIPHATIC CARBON-TO-CARBON DOUBLE BONDS, AND ACIDIC CONDENSATION AGENT AND IRRADIATING THE MIXTURE WITH BETA RAYS TO CAUSE SAID REACTANTS TO REACT AND PRODUCE BISPHENOLS.
References Cited (Backward Citations)
US1760758A
Cited
GB309002A
Cited
US1977627A
Cited
US1978849A
Cited
US2674572A
Cited
US2650253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |