US3316296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of para-(beta-hydroxyethoxy)benzoic acid
Assignee: Polyesterether Development Co Ltd
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Filing: 1963-06-10
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Granted: 1967-04-25
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Expires: 1983-06-10
Abstract
No abstract record available.
Inventors
- 👤 Mihara Keisuke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:49
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/347; C07C51/367
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR PRODUCING PARA-(B-HYDROXYETHOXY) BENZOIC ACID WHICH COMPRISES MIXING PARA-HYDROXY BENZONIC ACID WITH ETHYLENE OXIDE, THE MOLE RATIO OF PARAHYDROXY BENZOIC ACID TO ETHYLENE OXIDE BEING ABOUT 1:1.1-1.4, IN AN AQUEOUS ALKALINE SOLUTION, THE MOLE RATIO OF PARA-HYDROXY BENZOIC ACID TO WATER BEING ABOUT 1:8-50, AND MAINTAINING THE PH OF THE SOLUTION BETWEEN 10.0 AND 11.0 BY ADDING THERETO A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID, SULPHURIC ACID, CARBON DIOXIDE, SULPHUR DIOXIDE, PARA-HYDROXY BENZOIC ACID, PARA-(B-HYDROXYETHOXY) BENZOIC ACID AND A MIXTURE THEREOF, AND SIMULTANEOUSLY HEATING THE SOLUTION TO A TEMPERATURE BETWEEN 60* AND 100*C., AND THEN PRECIPITATING THE THUS-FORMED PARA-(B-HYDROXYETHOXY) BENZOIC ACID FROM THE SOLUTION.
Claim 2
Dependent Claim
109 words
A PROCESS FOR PRODUCING PARA-(B-HYDROXYETHOXY) BENZOIC ACID WHICH COMPRISES MIXING PARA-HYDROXY BENZONIC ACID WITH ETHYLENE OXIDE, THE MOLE RATIO OF PARAHYDROXY BENZOIC ACID TO ETHYLENE OXIDE BEING ABOUT 1:1.1-1.4, IN AN AQUEOUS ALKALINE SOLUTION, THE MOLE RATIO OF PARA-HYDROXY BENZOIC ACID TO WATER BEING ABOUT 1:8-50, AND MAINTAINING THE PH OF THE SOLUTION BETWEEN 10.0 AND 11.0 BY ADDING THERETO A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID, SULPHURIC ACID, CARBON DIOXIDE, SULPHUR DIOXIDE, PARA-HYDROXY BENZOIC ACID, PARA-(B-HYDROXYETHOXY) BENZOIC ACID AND A MIXTURE THEREOF, AND SIMULTANEOUSLY HEATING THE SOLUTION TO A TEMPERATURE BETWEEN 60* AND 100*C., AND THEN PRECIPITATING THE THUS-FORMED PARA-(B-HYDROXYETHOXY) BENZOIC ACID FROM THE SOLUTION.
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) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |