Patent US2938836A successfully refreshed from Google Patents.
US2938836A
Expired / Lapsed
US
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Process of preparing omicron-carbamyl-d-serine
Assignee: Laboratoires Francais de Chimiotherapie SA
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Filing: 1958-02-24
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Granted: 1960-05-31
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Expires: 1978-02-24
Abstract
No abstract record available.
Inventors
- 👤 Hagemann Guy
- 👤 Penasse Lucien
- 👤 Teillon Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:35
CPC Classifications
C; C12; C12P; C12P13/00; C12P13/04; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/815; Y10S435/8215; Y10S435/822; Y10S435/886
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN A PROCESS OF PRODUCING O-CARBAMYL-D-SERINE, THE STEPS COMPRISING CULTIVATING STREPTOMYCES POLYHROMOGENUS IN AN AQUEOUS, NUTRIENT MEDIUM CONTAINING PROTEINS, CARBOHYDRATES, AND MINERAL SALTS AND HAVING A PH BETWEEN ABOUT 6.0 AND ABOUT 5.5 UNDER AEROBIC CONDITIONS AND WITH AGITATION AT A TEMPERATURE BETWEEN ABOUT 20* C. AND ABOUT 32* C. UNTIL FORMATION OF O-CARBAMYL-DSERINE IS COMPLETED, AND RECOVERING THE RESULTING O-CARBAMYL-D-SERINE FROM THE NUTRIENT MEDIUM BY ADSORPTION TO A SULFONIC ION EXCHANGE RESIN IN ACID FORM AND SUBSEQUENT ELUTION BY MEANS OF AN AQUEOUS SOLUTION OF A VOLATILE WEAK BASE SELECTED FROM THE GROUP CONSISTING OF PYRIDINE AND AMMONIA.
Claim 2
Dependent Claim
99 words
IN A PROCESS OF PRODUCING O-CARBAMYL-D-SERINE, THE STEPS COMPRISING CULTIVATING STREPTOMYCES POLYHROMOGENUS IN AN AQUEOUS, NUTRIENT MEDIUM CONTAINING PROTEINS, CARBOHYDRATES, AND MINERAL SALTS AND HAVING A PH BETWEEN ABOUT 6.0 AND ABOUT 5.5 UNDER AEROBIC CONDITIONS AND WITH AGITATION AT A TEMPERATURE BETWEEN ABOUT 20* C. AND ABOUT 32* C. UNTIL FORMATION OF O-CARBAMYL-DSERINE IS COMPLETED, AND RECOVERING THE RESULTING O-CARBAMYL-D-SERINE FROM THE NUTRIENT MEDIUM BY ADSORPTION TO A SULFONIC ION EXCHANGE RESIN IN ACID FORM AND SUBSEQUENT ELUTION BY MEANS OF AN AQUEOUS SOLUTION OF A VOLATILE WEAK BASE SELECTED FROM THE GROUP CONSISTING OF PYRIDINE AND AMMONIA.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |