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:
Feb. 01, 2000
Filed:
Dec. 14, 1998
Applicant:
Inventors:
Noriyasu Hirose, Toyko, JP;
Hiroshi Inoue, Gifu Prefecture, JP;
Toshio Matsunami, Gifu Prefecture, JP;
Takashi Yoshimura, Gifu Prefecture, JP;
Kouzou Morita, Aichi Prefecture, JP;
Yuh Horikawa, Gifu Prefecture, JP;
Noriyoshi Iwata, Gifu Prefecture, JP;
Norio Minami, Ibaraki Prefecture, JP;
Kenji Hayashi, Ibaraki Prefecture, JP;
Chiaki Seki, Aichi Prefecture, JP;
Assignee:
Eisai Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549411 ;
Abstract
A process is provided for the preparation of .alpha.-tocopherol. According to the process, a condensation reaction between trimethylhydroquinone and a specific phytol derivative or isophytol is conducted in the presence of any one of the following solvents: