US2682504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of monochloropropionic acid
Assignee: 3M Co
•
Filing: 1952-01-02
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Granted: 1954-06-29
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Expires: 1972-01-02
Abstract
No abstract record available.
Inventors
- 👤 George C Harrison
- 👤 John M Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:55
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/347; C07C51/363; C07C51/377
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN THE CHLORINATION OF PROPIONIC ACID TO MONOCHLOROPROLPIONIC ACID BY ACTININC IRRADIATION OF A MIXTURE OF PROPIONIC ACID AND CHLORINE, THAT IMPROVEMENT WHICH COMPRISIES CARRYING OUT THE CHLORINATION AT AN INITIAL TEMPERATURE NOT HIGHER THAN ABOUT +20* C., UNDER IRRADIATION WITH LIGHT AT A WAVE LENGTH OF ABOUT 3650 ANGSTROMS, IN A LIQUID MIXTURE COMPRISING CHLORINE, A MAJOR PROPORTION OF PURE PROPIONIC ACID, THE AMOUNT OF CHLORINE BETA-CHLOROPROPIONIC ACID, THE AMOUNT OF CHLORINE PRESENT IN THE MIXTURE PRIOR TO REACTION BEING WITHIN THE RANGE OF ABOUT 0.05-1.0% OF THE AMOUNT OF PROPIONIC ACID; WHEREBY TO OBTAIN A YIELD OF BETA-CHLOROPROPIONIC ACID IN EXCESS OF THAT OBTAINABLE THROUGH RANDOM CHLORINATION.
Claim 2
Dependent Claim
109 words
IN THE CHLORINATION OF PROPIONIC ACID TO MONOCHLOROPROLPIONIC ACID BY ACTININC IRRADIATION OF A MIXTURE OF PROPIONIC ACID AND CHLORINE, THAT IMPROVEMENT WHICH COMPRISIES CARRYING OUT THE CHLORINATION AT AN INITIAL TEMPERATURE NOT HIGHER THAN ABOUT +20* C., UNDER IRRADIATION WITH LIGHT AT A WAVE LENGTH OF ABOUT 3650 ANGSTROMS, IN A LIQUID MIXTURE COMPRISING CHLORINE, A MAJOR PROPORTION OF PURE PROPIONIC ACID, THE AMOUNT OF CHLORINE BETA-CHLOROPROPIONIC ACID, THE AMOUNT OF CHLORINE PRESENT IN THE MIXTURE PRIOR TO REACTION BEING WITHIN THE RANGE OF ABOUT 0.05-1.0% OF THE AMOUNT OF PROPIONIC ACID; WHEREBY TO OBTAIN A YIELD OF BETA-CHLOROPROPIONIC ACID IN EXCESS OF THAT OBTAINABLE THROUGH RANDOM CHLORINATION.
References Cited (Backward Citations)
US1993713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-28 | 1957-12-28 | 1958-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-28 | 1961-12-28 | 1962-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-28 | 1965-12-28 | 1966-06-29 | $7700.00 | Window Closed / Lapsed |