US2715145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of phenol
Assignee: Hercules Powder Co
•
Filing: 1950-05-29
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Granted: 1955-08-09
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Expires: 1970-05-29
Abstract
No abstract record available.
Inventors
- 👤 Bewley Thomas
- 👤 Bowen Bertram Ernest Victor
- 👤 Bramwyche Peter Lionel
- 👤 Jackson Geoffrey William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:23
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/51; C07C45/53; C07C37/00; C07C37/08; C07C37/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN THE PROCESS FOR THE MANUFACTURE OF PHENOL BY THE DECOMPOSITION OF ISOPROPYL BENZENE PEROXIDES WITH AN ACIDIC CATALYST WHEREBY THERE IS FORMED A DECOMPOSITION REACTION MIXTURE COMPRISING ACETONE, ALPHA METHYL STYRENE, PHENOL, ACETOPHENONE AND PARA ALPHA CUMYL PHENOL, AND WHEREIN THE ACETONE, ALPHA METHYL STYRENE, PHENOL AND ACETOPHENONE ARE SUBSTANTIALLY SEPARATED FROM SAID DECOMPOSITION REACTION MIXTURE TO LEAVE A RESIDUE CONTAINING SAID PARA ALPHA CUMYL PHENOL, THE IMPROVEMENT WHICH COMPRISES PYROLYZING SAID RESIDUE AT A TEMPERATURE BETWEEN ABOUT 200* AND ABOUT 400* C. TO FORM ADDITIONAL QUANTITIES OF PHENOL AND ALPHA METHYL STYRENE.
Claim 2
Dependent Claim
94 words
IN THE PROCESS FOR THE MANUFACTURE OF PHENOL BY THE DECOMPOSITION OF ISOPROPYL BENZENE PEROXIDES WITH AN ACIDIC CATALYST WHEREBY THERE IS FORMED A DECOMPOSITION REACTION MIXTURE COMPRISING ACETONE, ALPHA METHYL STYRENE, PHENOL, ACETOPHENONE AND PARA ALPHA CUMYL PHENOL, AND WHEREIN THE ACETONE, ALPHA METHYL STYRENE, PHENOL AND ACETOPHENONE ARE SUBSTANTIALLY SEPARATED FROM SAID DECOMPOSITION REACTION MIXTURE TO LEAVE A RESIDUE CONTAINING SAID PARA ALPHA CUMYL PHENOL, THE IMPROVEMENT WHICH COMPRISES PYROLYZING SAID RESIDUE AT A TEMPERATURE BETWEEN ABOUT 200* AND ABOUT 400* C. TO FORM ADDITIONAL QUANTITIES OF PHENOL AND ALPHA METHYL STYRENE.
References Cited (Backward Citations)
US2113951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-08 | 1959-02-07 | 1959-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-08 | 1963-02-07 | 1963-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-08 | 1967-02-07 | 1967-08-09 | $7700.00 | Window Closed / Lapsed |