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:
Apr. 16, 2002
Filed:
Nov. 22, 1999
Yoshiaki Miyota, Kanagawa, JP;
Akira Shibuya, Kanagawa, JP;
Masaru Yasuda, Kanagawa, JP;
Kimitaka Ohshiro, Kanagawa, JP;
Makoto Saito, Kanagawa, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
(1) Methods for producing isochromanone compounds from o-xylene compounds as starting compounds through &agr;-halogeno-o-xylene derivatives, &agr;-cyano-o-xylene derivatives, and &agr;-halogeno-&agr;′-cyano-o-xylene derivatives, and (2) methods for producing isochromanone compounds from o-xylene compounds as starting compounds through &agr;,&agr;′-dihalogeno-o-xylene derivatives, &agr;,&agr;′-dihydroxy-o-xylene derivatives, &agr;-halogeno-&agr;′-hydroxy-o-xylene derivatives and &agr;-cyano-&agr;′-hydroxy-o-xylene derivatives, and methods for producing these intermediate compounds.