Patent US3598114A successfully refreshed from Google Patents.
Patent US3383425A successfully refreshed from Google Patents.
US3383425A
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Separation of hydroxydiphenylalkanes
Assignee: Imperial Chemical Industries Ltd
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Filing: 1964-09-28
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Granted: 1968-05-14
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Expires: 1984-09-28
Abstract
No abstract record available.
Inventors
- 👤 Mansfield Geoffrey Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:21
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/64; C07C37/66; C07C37/01; C07C37/055; C07C37/68; C07C37/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR THE SEPARATION OF P-CUMYLPHENOL FROM DECOMPOSITION PRODUCTS OF CUMENE HYDROPEROXIDE IN WHICH THE SODIUM SALT OF P-CUMYLPHENOL IS PRECIPITATED FROM THE DECOMPOSITION PRODUCT BY REACTING IT AT A TEMPERATURE BETWEEN 0* AND 40*C. WITH SUCH AN EXCESS OF AQUEOUS SODIUM HYDROXIDE THAT THE CONCENTRATION OF SODIUM IONS, APART FROM THOSE ASSOCIATED WITH SODIUM P-CUMYLPHENATE IN THE LIQUID REACTION PRODUCT IS GREATER THAN THE CONCENTRATION OF SODIUM IONS IN A 2% BY WEIGHT AQUEOUS SOLUTION OF SODIUM HYDROXIDE AND THE PRECIPITATED SODIUM P-CUMYLPHEANTE IS ACIDIFIED TO OBTAIN P-CUMYLPHENOL.
Claim 2
Dependent Claim
90 words
A PROCESS FOR THE SEPARATION OF P-CUMYLPHENOL FROM DECOMPOSITION PRODUCTS OF CUMENE HYDROPEROXIDE IN WHICH THE SODIUM SALT OF P-CUMYLPHENOL IS PRECIPITATED FROM THE DECOMPOSITION PRODUCT BY REACTING IT AT A TEMPERATURE BETWEEN 0* AND 40*C. WITH SUCH AN EXCESS OF AQUEOUS SODIUM HYDROXIDE THAT THE CONCENTRATION OF SODIUM IONS, APART FROM THOSE ASSOCIATED WITH SODIUM P-CUMYLPHENATE IN THE LIQUID REACTION PRODUCT IS GREATER THAN THE CONCENTRATION OF SODIUM IONS IN A 2% BY WEIGHT AQUEOUS SOLUTION OF SODIUM HYDROXIDE AND THE PRECIPITATED SODIUM P-CUMYLPHEANTE IS ACIDIFIED TO OBTAIN P-CUMYLPHENOL.
References Cited (Backward Citations)
US2750426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |