Patent US3043882A successfully refreshed from Google Patents.
US3043882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of resorcinol
Assignee: Hercules Powder Co
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Filing: 1959-08-05
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Granted: 1962-07-10
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Expires: 1979-08-05
Abstract
No abstract record available.
Inventors
- 👤 Thompson Bernard Hammo Markham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:19
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN THE PROCESS FOR THE PRODUCTION OF RESORCINOL WHEREIN (1) A REACTAION MIXTURE DERIVED FROM THE OXIDATION OF META-DIISOPROPYLBENZENE AND CONTAINING META-DIISOPROPYLBENZENE DIHYDROPEROXIDE IS SUBJECTED TO ACID CLEAVAGE TO PRODUCE RESORCINOL AND MATERIAL LESS VOLATILE THAN RESORCINOL, (2) THE MATERIAL LESS VOLATILE THAN RESORCINOL IS HEAT DECOMPOSED WHILE PASSING STEAM THROUGH SAID MATERIAL, (3) THE ADDITIONAL QUANTITIES OF RESORCINOL AND META-ISOPROPENYL PHENOL SO FORMED ARE SIMULTANEOUSLY DISTILLED OFF, AND (4) THE RESORCINOL IS RECOVERED FROM THE AQUEOUS DISTILLATE, THE IMPROVEMENT OF MAINTAINING THE PH OF THE AQUEOUS DISTILLATE AT A VALUE BETWEEN 4 AND 7 BY CARRYING OUT THE HEAT DECOMPOSITION OF THE MATERIAL LESS VOLATILE THAN RESORCINOL IN THE PRESENCE OF AMMONIUM SULFATE.
Claim 2
Dependent Claim
114 words
IN THE PROCESS FOR THE PRODUCTION OF RESORCINOL WHEREIN (1) A REACTAION MIXTURE DERIVED FROM THE OXIDATION OF META-DIISOPROPYLBENZENE AND CONTAINING META-DIISOPROPYLBENZENE DIHYDROPEROXIDE IS SUBJECTED TO ACID CLEAVAGE TO PRODUCE RESORCINOL AND MATERIAL LESS VOLATILE THAN RESORCINOL, (2) THE MATERIAL LESS VOLATILE THAN RESORCINOL IS HEAT DECOMPOSED WHILE PASSING STEAM THROUGH SAID MATERIAL, (3) THE ADDITIONAL QUANTITIES OF RESORCINOL AND META-ISOPROPENYL PHENOL SO FORMED ARE SIMULTANEOUSLY DISTILLED OFF, AND (4) THE RESORCINOL IS RECOVERED FROM THE AQUEOUS DISTILLATE, THE IMPROVEMENT OF MAINTAINING THE PH OF THE AQUEOUS DISTILLATE AT A VALUE BETWEEN 4 AND 7 BY CARRYING OUT THE HEAT DECOMPOSITION OF THE MATERIAL LESS VOLATILE THAN RESORCINOL IN THE PRESENCE OF AMMONIUM SULFATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |