Patent US2842597A successfully refreshed from Google Patents.
US2842597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of phenols and ketones
Assignee: —
•
Filing: —
•
Granted: 1958-07-08
•
Expires: 1975-07-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:30
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/04; C07C49/08; C07C45/00; C07C45/51; C07C45/53; C07C37/00; C07C37/08; C07C39/00; C07C39/02; C07C39/04; C07C407/00; C07C45/78; C07C45/85
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PROCESS FOR THE SIMULTANEOUS PRODUCTION OF PHENOLIC AND CARBONYL SUBSTANCES WHICH COMPRISES EFFECTING THE DECOMPOSITION OF AN ALKYL AROMATIC HYDROPEROXIDE BY TREATMENT WITH SULPHURIC ACID, WASHING THE REACTION PRODUCTS WITH A 0.5 TO 5% BY WEIGHT AQUEOUS SOLUTION OF A SUBSTANTIALLY NON-VOLATILE CARBOXYLIC ACID WHICH HAS AN IONISATION CONSTANT OF AT LEAST 1 ? 10-4 AND AT MOST 1 X 10-2, MEASURED AT 25*C., SAID AQUEOUS SOLUTION HAVING A PH OF AT LEAST 1.8 AND AT MOST 5 AND CONSTITUTING AT MOST 10% BY VOLUME OF THE SAID REACTION PRODUCTS, SEPARATING THE ORGANIC PHASE FROM THE AQUEOUS PHASE CONTAINING THE SULPHURIC ACID AND THERAFTER SEPARATING ORGANIC PHASE BY DISTILLATION.
Claim 2
Dependent Claim
110 words
A PROCESS FOR THE SIMULTANEOUS PRODUCTION OF PHENOLIC AND CARBONYL SUBSTANCES WHICH COMPRISES EFFECTING THE DECOMPOSITION OF AN ALKYL AROMATIC HYDROPEROXIDE BY TREATMENT WITH SULPHURIC ACID, WASHING THE REACTION PRODUCTS WITH A 0.5 TO 5% BY WEIGHT AQUEOUS SOLUTION OF A SUBSTANTIALLY NON-VOLATILE CARBOXYLIC ACID WHICH HAS AN IONISATION CONSTANT OF AT LEAST 1 ? 10-4 AND AT MOST 1 X 10-2, MEASURED AT 25*C., SAID AQUEOUS SOLUTION HAVING A PH OF AT LEAST 1.8 AND AT MOST 5 AND CONSTITUTING AT MOST 10% BY VOLUME OF THE SAID REACTION PRODUCTS, SEPARATING THE ORGANIC PHASE FROM THE AQUEOUS PHASE CONTAINING THE SULPHURIC ACID AND THERAFTER SEPARATING ORGANIC PHASE BY DISTILLATION.
References Cited (Backward Citations)
CA477824A
Cited
US2672485A
Cited
US2720549A
Cited
US2728795A
Cited
US2728793A
Cited
US2750424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |