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. 13, 1976
Filed:
Sep. 27, 1974
Applicant:
Inventors:
Gunter Bison, Troisdorf, DT;
Walter Heinzelmann, Leverkusen, DT;
Norbert Linkat, St. Augustin, DT;
Wolfgang Wolfes, Mondorf, DT;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603 / ; 2603 / ;
Abstract
Process for producing tetrazole-1-acetic acid of maximum purity includes the steps of providing a crude reaction product containing an alkyl ester of tetrazole-1-acetic acid having from 1 to 4 carbon atoms in the alkyl group, effecting molecular distillation of this reaction product at a temperature below 130.degree.C. under a vacuum of 10.sup.-.sup.1 torr to obtain a distillant containing the alkyl ester and then gently hydrolyzing the resultant distillate to obtain the desired acid product.