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:
Jan. 20, 1976
Filed:
Oct. 24, 1974
Applicant:
Inventors:
Assignee:
Archifar Industrie Chimiche Del Trentino S.p.A., Rovereto, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
2602 / ;
Abstract
A process for preparing rifamycin S from rifamycin O. Rifamycin O is dissolved in a mixture of an organic solvent and an alcohol at room temperature. The rifamycin O is then hydrolyzed with a mineral acid and the thus obtained rifamycin S is purified by crystallization.