Patent US2831797A successfully refreshed from Google Patents.
US2831797A
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Cephalosporin n production
Assignee: National Research Development Corp UK
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Filing: 1954-10-11
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Granted: 1958-04-22
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Expires: 1974-10-11
Abstract
No abstract record available.
Inventors
- 👤 Miller George Arthur
- 👤 Kelly Brendan Kevin
- 👤 Newton Guy Geoffrey Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:48
CPC Classifications
C; C12; C12P; C12P37/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN A PROCESS FOR THE PRODUCTION OF THE ANTIBIOTIC CEPHALOSPORIN N BY FERMENTING A NUTRITIONAL SUBSTRATE WITH A MOLD OF THE SPECIES OF WHICH CEPHALOSPORIUM I. M. I. 48137 (A. T. C. C. NO. 11550) IS A MEMBER, IN THE PRESENCE OF MOLECULAR OXYGEN, THE IMPROVEMENT OF CARRYING OUT THE FERMENTING STEP WITH A SMALL PROPORTION OF D-METHIONINE IN ADMIXTURE WITH SAID SUBSTRATE, AND THEREAFTER SEPARATING THE MOLD AND THE CEPHALOSPORIN N THEREBY PRODUCED.
Claim 2
Dependent Claim
74 words
IN A PROCESS FOR THE PRODUCTION OF THE ANTIBIOTIC CEPHALOSPORIN N BY FERMENTING A NUTRITIONAL SUBSTRATE WITH A MOLD OF THE SPECIES OF WHICH CEPHALOSPORIUM I. M. I. 48137 (A. T. C. C. NO. 11550) IS A MEMBER, IN THE PRESENCE OF MOLECULAR OXYGEN, THE IMPROVEMENT OF CARRYING OUT THE FERMENTING STEP WITH A SMALL PROPORTION OF D-METHIONINE IN ADMIXTURE WITH SAID SUBSTRATE, AND THEREAFTER SEPARATING THE MOLD AND THE CEPHALOSPORIN N THEREBY PRODUCED.
References Cited (Backward Citations)
US2563793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |