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. 13, 1976
Filed:
Jun. 19, 1974
Applicant:
Inventors:
Hans Fernholz, Fischbach, Taunus, DT;
Hans-Joachim Schmidt, Falkenstein, Taunus, DT;
Friedrich Wunder, Florsheim, Main, DT;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2605 / ;
Abstract
Process for purifying sorbic acid by recrystallization from aqueous solutions of an alkali metal or ammonium salt of a carboxylic acid or phosphoric acid. Impurities may be eliminated in addition by means of an adsorption agent.