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:
Dec. 19, 1978
Filed:
May. 18, 1977
Applicant:
Inventors:
Otto Roos, Ingelheim am Rhein, DE;
Dieter Essig, Bad Kreuznach, DE;
Assignee:
Boehringer Ingelheim GmbH, Ingelheim am Rhein, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2602391 ;
Abstract
A process for the preparation of an alkali metal salt of ampicillin, especially the sodium salt, which comprises adding to an aqueous suspension of ampicillin, at a temperature not exceeding about 4.degree. C, an aqueous solution of an equimolar or somewhat lesser amount of an alkali metal base, filtering the resulting solution until sterile, freezing the filtrate, and lyophilizing the frozen filtrate.