Patent US2864869A successfully refreshed from Google Patents.
US2864869A
Expired / Lapsed
US
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Phenol purification
Assignee: Hercules Powder Co
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Filing: 1956-02-14
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Granted: 1958-12-16
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Expires: 1976-02-14
Abstract
No abstract record available.
Inventors
- 👤 Crocker Henry Peter
- 👤 Hall Reginald Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:36
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE PROCESS FOR THE PURIFICATION OF PHENOL PRODUCED BY THE DECOMPOSITION OF CUMENE HYDROPEROXIDE AND CONTAINING IMPURITIES WHICH GIVE RISE TO COLOR FORMATION ON CHLORINATION WHICH COMPRISES CONTACTING THE PHENOL AT AN ELEVATED TEMPERATURE WITH AN AMONIO-COMPOUND OF THE FORMULA R-NH2, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF HYDROXYL, AMINO. AND SUBSTITUTED AMINO RADICALS, IN A PREDETERMINED STOICHIOMETRIC AMOUNT REQUIRED TO BIND ALL OF SAID IMPURITY, HEATING AT A TEMPERATURE IN THE RANGE OF ABOUT 41*C. TO ABOUT 182*C. UNTIL SAID PURITY IS BOUND AND DISTILLING PHENOL FREE OF SAID AMINO COMPOUND, SAID IMPURITY AND SAID BOUND IMPURITY.
Claim 2
Dependent Claim
100 words
THE PROCESS FOR THE PURIFICATION OF PHENOL PRODUCED BY THE DECOMPOSITION OF CUMENE HYDROPEROXIDE AND CONTAINING IMPURITIES WHICH GIVE RISE TO COLOR FORMATION ON CHLORINATION WHICH COMPRISES CONTACTING THE PHENOL AT AN ELEVATED TEMPERATURE WITH AN AMONIO-COMPOUND OF THE FORMULA R-NH2, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF HYDROXYL, AMINO. AND SUBSTITUTED AMINO RADICALS, IN A PREDETERMINED STOICHIOMETRIC AMOUNT REQUIRED TO BIND ALL OF SAID IMPURITY, HEATING AT A TEMPERATURE IN THE RANGE OF ABOUT 41*C. TO ABOUT 182*C. UNTIL SAID PURITY IS BOUND AND DISTILLING PHENOL FREE OF SAID AMINO COMPOUND, SAID IMPURITY AND SAID BOUND IMPURITY.
References Cited (Backward Citations)
US1973724A
Cited
US2124171A
Cited
US2247523A
Cited
US2530772A
Cited
US2673834A
Cited
US2727925A
Cited
US2679535A
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 |