US2640073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrohalogenation of dihalopropionic acid compounds
Assignee: GAF Chemicals Corp
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Filing: 1950-11-03
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Granted: 1953-05-26
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Expires: 1970-11-03
Abstract
No abstract record available.
Inventors
- 👤 Jr William O Ney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:27
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/62; C07C69/65; C07C69/653
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
70 words
A PROCESS FOR THE PREPARATION OF AN ESTER OF A-CHLOROACRYLIC ACID, WHICH COMPRISES HEATING THE CORRESPONDING ESTER OF A,B-DIHALOPROPIONIC ACID AT A TEMPERATURE FROM 60 TO 110* C. WITH AN AQUEOUS SOLTUION OF AN ALKALI METAL MONOHYDROGEN PHOSPHATE TOGETHER WITH AN ALKALI METAL DIHYDROGEN PHOSPHATE, SAID SOLUTION HAVING A PH BETWEEN 4 AND 7, AND THE CONCENTRATION OF SAID ALKALI METAL MONOHYDROGEN PHOSPHATE BEING AT LEAST 10% THROUGHOUT THE REACTION.
References Cited (Backward Citations)
US1934613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |