The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 30, 1980
Filed:
Apr. 30, 1979
Applicant:
Inventors:
Walter D Celmer, New London, CT (US);
Walter P Cullen, East Lyme, CT (US);
John R Oscarson, Pawcatuck, CT (US);
Liang H Huang, East Lyme, CT (US);
Riichiro Shibakawa, Handa, JP;
Junsuke Tone, Aichi, JP;
Assignee:
Pfizer Inc., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12P / ;
U.S. Cl.
CPC ...
435122 ; 435886 ; 2602 / ;
Abstract
A new subspecies of Streptomyces nigellus Prokop, designated Streptomyces nigellus Prokop subsp. africanus Huang subsp. nov. ATCC 31496, when propagated under aerobic conditions in aqueous nutrient media, produces a mixture of antibiotics. One of these antibiotics is the known macrolide antibiotic cirramycin A; the ansamycin antibiotic is an analogue of protostreptovaricin and the structure has been established as 21-hydroxy, 25-demethyl, 25-methylthioprotostreptovaricin I.