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. 09, 2007
Filed:
Dec. 19, 2002
Applicants:
Hiroyuki Honda, Kanagawa, JP;
Hiroki Nakano, Kanagawa, JP;
Shigeaki Numata, Kanagawa, JP;
Inventors:
Assignee:
Kawasaki Kasei Chemicals Ltd., Kawasaki-shi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 43/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
An industrially advantageous process is presented whereby a high purity anthracene diether can be produced in good yield. An aqueous medium containing an alkali salt of 9,10-anthracenediol is added to an organic solvent containing an etherifying agent in the presence or absence of a quaternary ammonium compound or a quaternary phosphonium compound, to carry out the etherifying reaction to produce the anthracene diether.