US2628983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of phenols
Assignee: Hercules Powder Co
•
Filing: 1948-01-29
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Granted: 1953-02-17
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Expires: 1968-01-29
Abstract
No abstract record available.
Inventors
- 👤 Aller Basil Vivian
- 👤 Hall Reginald Harold
- 👤 Quin Denis Cheselden
- 👤 Turck Karl Heinrich Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:02
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR THE PRODUCTION OF PHENOLS, WHICH COMPRISES OXIDIZING IN THE LIQUID PHASE A BENZENE HOMOLOGUE IN WHICH THE BENZENE RING IS SUBSTITUTED BY AT LEAST ONE ALKYL GROUP, ONE OF WHICH HAS A TERTIARY CARBON ATOM IN THE ALPHA POSITION TO THE BENZENE RING, BY MOLECULAR OXYGEN, WHEREBY PER-COMPOUNDS ARE PRODUCED THEREFROM, TERMINATING THE OXIDATION WHILE THE RESULTING, REACTION MIXTURE CONTAINS A SUBSTANTIAL AMOUNT OF UNREACTED ALKYL BENZENE, REACTING SAID PER-COMPOUNDS DISSOLVED IN SAID UNREACTED ALKYL BENZENE BY BRINGING THE MIXTURE RESULTING FROM SAID OXIDATION REACTION INTO INTIMATE CONTACT WITH ACID UNTIL DECOMPOSITION OF THE PRE-COMPOUNDS IS PRACTICALLY COMPLETE, AND SEPARATING THE PRODUCED PHENOLS AND KETONE FROM THE RESULTING REACTION MIXTURE.
Claim 2
Dependent Claim
113 words
A PROCESS FOR THE PRODUCTION OF PHENOLS, WHICH COMPRISES OXIDIZING IN THE LIQUID PHASE A BENZENE HOMOLOGUE IN WHICH THE BENZENE RING IS SUBSTITUTED BY AT LEAST ONE ALKYL GROUP, ONE OF WHICH HAS A TERTIARY CARBON ATOM IN THE ALPHA POSITION TO THE BENZENE RING, BY MOLECULAR OXYGEN, WHEREBY PER-COMPOUNDS ARE PRODUCED THEREFROM, TERMINATING THE OXIDATION WHILE THE RESULTING, REACTION MIXTURE CONTAINS A SUBSTANTIAL AMOUNT OF UNREACTED ALKYL BENZENE, REACTING SAID PER-COMPOUNDS DISSOLVED IN SAID UNREACTED ALKYL BENZENE BY BRINGING THE MIXTURE RESULTING FROM SAID OXIDATION REACTION INTO INTIMATE CONTACT WITH ACID UNTIL DECOMPOSITION OF THE PRE-COMPOUNDS IS PRACTICALLY COMPLETE, AND SEPARATING THE PRODUCED PHENOLS AND KETONE FROM THE RESULTING REACTION MIXTURE.
References Cited (Backward Citations)
US2434888A
Cited
US2527640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |