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, 2013
Filed:
May. 01, 2009
Satoshi Kodama, Chiba, JP;
Toshiyuki Fukami, Chiba, JP;
Hiroshi Fujii, Chiba, JP;
Tadashi Kawakami, Chiba, JP;
Toshio Aihara, Chiba, JP;
Satoshi Kodama, Chiba, JP;
Toshiyuki Fukami, Chiba, JP;
Hiroshi Fujii, Chiba, JP;
Tadashi Kawakami, Chiba, JP;
Toshio Aihara, Chiba, JP;
Nippon Soda Co., Ltd., Tokyo, JP;
Abstract
Provided is a color-developing composition for recording materials having a superior heat resistance. The color-developing composition is a reaction composition containing a mixture of compounds represented by formula (III) obtained by reacting a dihydroxydiphenylsulfone derivative represented by formula (I) with a dihalide represented by formula (II) X—Y—X (II), wherein, in a composition where the content of a compound with n=1 in said reaction composition is from 5 to 80% by mass of the total solid content of the composition, at least 10% by mass of the compound with n=1 is a crystalline material.