US3825473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cephalosporin c
Assignee: Alfa Farmaceutici SpA
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Filing: 1972-08-04
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Granted: 1974-07-23
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Expires: 1992-08-04
Abstract
Abstract CEPHALOSPORIN C, WHICH IS USEFUL AS A STARTING MATERIAL IN THE PREPARATION OF THE SEMI-SYNTHETIC CEPHALOSPORIN ANTIBIOTICS, IS PRODUCED BY THE AEROBIC CULTIVATION OF A NOVEL MICROORGANISM, CEPHALOSPORIUM SP. STRAIN F. 12 (ATCC 20339). THE CULTIVATION IS PERFORMED IN A NUTRIENT MEDIUM CONTAINING ASSIMILABLE SOURCES OF CARBON AND NITROGEN, ONE OR MORE INORGANIC SALTS, AND AN ORGANIC SOURCE OF SULFUR. HIGH YIELDS OF CEPHALOSPORIN C ARE OBTAINED, WITH REDUCED YIELDS OF THE UNDESIRABLE BY-PRODUCT CEPHALOSPORIN N, BY COMPARISON WITH PREVIOUSLY USED CEPHALOSPORIUM STRAINS.
Inventors
- 👤 F Gargiuolo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:30
CPC Classifications
C; C12; C12P; C12P35/00; C12P35/06; Y; Y10; Y10S; Y10S435/00; Y10S435/813; Y10S435/8215; Y10S435/911; Y10S435/925
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |