US2783274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making serine
Assignee: Dow Chemical Co
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Filing: 1953-11-09
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Granted: 1957-02-26
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Expires: 1973-11-09
Abstract
No abstract record available.
Inventors
- 👤 Halbert C White
- 👤 Don V Wysong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:25
CPC Classifications
C; C07; C07C; C07C229/00; C07C229/02; C07C229/04; C07C229/22; C07C231/00; C07C231/02; C07C231/12; C07C237/00; C07C237/02; C07C237/22; C07B; C07B2200/00; C07B2200/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD WHICH COMPRISES (1) REACTING BROMINE WITH ACRYLAMIDE TO FORM ALPHA,BETA-DIBROMO-PROPIONAMIDE, (2) REACTING THE ALPHA,BETA-DIBROMO-PROPIONAMIDE WITH A METAL ALKOXIDE IN THE PRESENCE OF MORE THAN THE STOICHIOMETRIC AMOUNT OF THE LATTER AT TEMPERATURES WHICH, TOWARD THE END OF THE REACTION, ARE BETWEEN 0* AND 40* C. WHEREBY AN ALPHA-BROMO-BETA-ALKOXY-PROPIONAMIDE IS FORMED, (3) REACTING THE LATTER WITH AMMONIA TO FORM AN ALPHA-AMINO-BETA-ALKOXY-PROPIONAMIDE, AND (4) HYDROLYZING THE ALPHA-AMINO-BETA-ALKOXY-PROPIONAMIDE BY HEATING THE SAME TOGETHER WITH AN AQUEOUS SOLUTION OF AT LEAST ONE ACID SELECTED FROM THE CLASS CONSISTING OF HYDROCHLORIC ACID AND HYDROBROMIC ACID.
Claim 2
Independent Claim
92 words
A METHOD WHICH COMPRISES (1) REACTING BROMINE WITH ACRYLAMIDE TO FORM ALPHA,BETA-DIBROMO-PROPIONAMIDE, (2) REACTING THE ALPHA,BETA-DIBROMO-PROPIONAMIDE WITH A METAL ALKOXIDE IN THE PRESENCE OF MORE THAN THE STOICHIOMETRIC AMOUNT OF THE LATTER AT TEMPERATURES WHICH, TOWARD THE END OF THE REACTION, ARE BETWEEN 0* AND 40* C. WHEREBY AN ALPHA-BROMO-BETA-ALKOXY-PROPIONAMIDE IS FORMED, (3) REACTING THE LATTER WITH AMMONIA TO FORM AN ALPHA-AMINO-BETA-ALKOXY-PROPIONAMIDE, AND (4) HYDROLYZING THE ALPHA-AMINO-BETA-ALKOXY-PROPIONAMIDE BY HEATING THE SAME TOGETHER WITH AN AQUEOUS SOLUTION OF AT LEAST ONE ACID SELECTED FROM THE CLASS CONSISTING OF HYDROCHLORIC ACID AND HYDROBROMIC ACID.
References Cited (Backward Citations)
US2571755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |