Patent US3772389A successfully refreshed from Google Patents.
US3772389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the synthesis of phenyl esters
Assignee: Eastman Kodak Co
•
Filing: 1971-06-24
•
Granted: 1973-11-13
•
Expires: 1991-06-24
Abstract
Abstract A PROCESS FOR THE SYNTHESIS OF PHENYL ESTERS DIRECTLY FROM THE CORRESPONDING PHENOLS AND CARBOXYLIC ACIDS WHICH COMPRISES CONTACTING A PHENOLIC COMPOUND HAVING AT LEAST ONE HYDROGEN ATOM ADJACENT THE ACTIVE HYDROXYL GROUP WITH A CARBOXYLIC ACID COMPOUND CONTAINING AT LEAST ONE ACTIVE CARBOXYLIC GROUP IN THE PRESENCE OF A CATALYTIC AMOUNT OF A BORATE-SULFURIC ACID CATALYST COMPLEX. THE PROCESS IS CARRIED OUT IN A SINGLE STAGE REACTOR WHICH MAY BE OPERATED AT FROM 75*C. TO 285*C. UNDER ATMOSPHERIC, SUBATMOSPHERIC OR SUPERATMOSPHERIC PRESSURE. IF DESIRABLE, A SOLVENT CAN BE EMPLOYED.
Inventors
- 👤 W Lowrance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:29
CPC Classifications
C; C07; C07C; C07C213/00; C07C213/06; C07C201/00; C07C201/06; C07C201/12; C07C253/00; C07C253/30; C07C315/00; C07C315/04; C07C67/00; C07C67/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |