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. 12, 1980
Filed:
Feb. 13, 1979
Applicant:
Inventors:
Youziro Yoshino, Kawagoe, JP;
Kazuko Kondo, Kawagoe, JP;
Assignee:
Nisshin Flour Milling Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603455 ;
Abstract
A process for preparing high purity dl-.alpha.-tocopherol by condensing trimethylhydroquinone and a phytol in the presence of zinc chloride, a mineral acid and, either silica-alumina or silica gel, or a combination of silica-alumina and silica gel, is described.