Patent US2504425A successfully refreshed from Google Patents.
US2504425A
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Separation of pure methionine from methionine nitrile hydrolyzates
Assignee: EIDP Inc
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Filing: 1948-05-18
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Granted: 1950-04-18
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Expires: 1968-05-18
Abstract
No abstract record available.
Inventors
- 👤 Robert D Kralovec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:36
CPC Classifications
C; C07; C07C; C07C227/00; C07C227/38; C07C227/40; C07C319/00; C07C319/14; C07C319/20; C07C319/26; C07C319/28; C07C323/00; C07C323/50; C07C323/51; C07C323/57; C07C323/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN A PROCESS FOR SEPARATING PURE METHIONINE FROM METHIONINE NITRILE HYDROLYSIS PRODUCTS, THE STEPS WHICH COMPRISE EXTRACTING AN AQUEOUS SOLUTION OF METHIONINE NITRILE HYDROLYSIS PRODUCTS AT A PH OF 2 TO 7.5 WITH AN ALCOHOL OF THE CLASS CONSISTING OF BENZYL ALCOHOL, CYCLOPENTANOL, CYCLOHEXANOL, METHYL CYCLOHEXANOL, PHENYL ETHYL ALCOHOL, AND N-BUTANOL, AND THEREAFTER SEPARATING METHIONINE FROM THE RESULTANT AQUEOUS RESIDUE.
Claim 2
Dependent Claim
60 words
IN A PROCESS FOR SEPARATING PURE METHIONINE FROM METHIONINE NITRILE HYDROLYSIS PRODUCTS, THE STEPS WHICH COMPRISE EXTRACTING AN AQUEOUS SOLUTION OF METHIONINE NITRILE HYDROLYSIS PRODUCTS AT A PH OF 2 TO 7.5 WITH AN ALCOHOL OF THE CLASS CONSISTING OF BENZYL ALCOHOL, CYCLOPENTANOL, CYCLOHEXANOL, METHYL CYCLOHEXANOL, PHENYL ETHYL ALCOHOL, AND N-BUTANOL, AND THEREAFTER SEPARATING METHIONINE FROM THE RESULTANT AQUEOUS RESIDUE.
References Cited (Backward Citations)
US2071282A
Cited
US2443391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |