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:
Aug. 09, 1977
Filed:
Jun. 24, 1975
Applicant:
Inventors:
Haruo Watanabe, Funabashi, JA;
Toru Kitagawa, Ichikawa, JA;
Masaaki Negishi, Chiba, JA;
Kiichi Aonuki, Tokyo, JA;
Harunobu Kobayashi, Musashino, JA;
Assignee:
Showa Sangyo Co. Ltd., Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
260424 ; 210 21 ;
Abstract
The autoxidation resistance of an animal or vegetal fat or oil containing trace amounts of heavy metals which catalyze the autoxidation can be improved by contacting the fat or oil with solid citric, malic, or tartaric acid at a temperature below the melting point of the acid, and thereafter separating the acid particles from the fat or oil.