US2790000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
L-glutamine synthesis
Assignee: International Minerals and Chemical Corp
•
Filing: 1954-09-01
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Granted: 1957-04-23
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Expires: 1974-09-01
Abstract
No abstract record available.
Inventors
- 👤 Oscar L Norman
- 👤 Joyce Rose Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:18
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D207/273; C07D207/277; C07D207/28; C07C; C07C237/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A PROCESS FOR PRODUCING L-GLUTAMINE WHICH COMPRISES HYDROLYZING AN ALKYL ESTER OF A COMPOUND OF THE GROUP CONSISTING OF ISOGLUTAMINE AND ISOGLUTAMINE ACID ADDITION SALTS UNDER ALKALINE CONDITIONS AND RECOVERING L-GLUTAMINE FROM THE REACTION PRODUCT MIXTURE.
Claim 2
Dependent Claim
36 words
A PROCESS FOR PRODUCING L-GLUTAMINE WHICH COMPRISES HYDROLYZING AN ALKYL ESTER OF A COMPOUND OF THE GROUP CONSISTING OF ISOGLUTAMINE AND ISOGLUTAMINE ACID ADDITION SALTS UNDER ALKALINE CONDITIONS AND RECOVERING L-GLUTAMINE FROM THE REACTION PRODUCT MIXTURE.
References Cited (Backward Citations)
US2524422A
Cited
US2543345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |