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:
Oct. 19, 1976
Filed:
Jan. 23, 1975
Applicant:
Inventors:
Assignee:
UBE Industries, Ltd., Ube, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2604045 ; 260404 ;
Abstract
A crude 11-cyano-undecanoic acid in the form of the free acid or its ammonium salt is refined by bringing a refining gas containing ozone therein into contact with a solution of the crude 11-cyano-undecanoic acid or its ammonium salt in a substantially anhydrous organic solvent which is non-reactive with the ozone at a temperature of 0.degree. to 100.degree. C, for example, formic acid, acetic acid, propionic acid, chloroform, tetrachloromethane, dichloroethane or trichloroethane.