US2969353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of "active methionine" and products obtained thereby
Assignee: Merck and Co Inc
•
Filing: 1957-02-06
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Granted: 1961-01-24
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Expires: 1977-02-06
Abstract
No abstract record available.
Inventors
- 👤 Clifford H Shunk
- 👤 John W Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:57
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/16; B; B01; B01J; B01J31/00; B01J31/02; B01J31/06; B01J31/08; B01J2231/00; B01J2231/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
THE PROCESS FOR MAKING S-ADENOSYL-METHIONINE, WHICH COMPRISES CONTACTING THE REACTION PRODUCT OF ADENOSYL-HOMOCYSTEINE AND A METHYL HALIDE WITH A CATION EXCHANGE SUBSTANCE ON THE AMMONIUM CYCLE AND HAVING A WEAK ACID FUNCTIONAL GROUP AND ELUTING S-ADENOSYL-METHIONINE FROM SAID SUBSTANCE WITH A STRONG ACID.
Claim 2
Dependent Claim
43 words
THE PROCESS FOR MAKING S-ADENOSYL-METHIONINE, WHICH COMPRISES CONTACTING THE REACTION PRODUCT OF ADENOSYL-HOMOCYSTEINE AND A METHYL HALIDE WITH A CATION EXCHANGE SUBSTANCE ON THE AMMONIUM CYCLE AND HAVING A WEAK ACID FUNCTIONAL GROUP AND ELUTING S-ADENOSYL-METHIONINE FROM SAID SUBSTANCE WITH A STRONG ACID.
References Cited (Backward Citations)
US2387824A
Cited
US2700038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |