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:
Dec. 15, 2009
Filed:
Apr. 18, 2005
Mikihiko Kurose, Yoshida-gun, JP;
Takeo Hasegawa, Sakai, JP;
Mikihiko Kurose, Yoshida-gun, JP;
Takeo Hasegawa, Sakai, JP;
Nicca Chemical Co., Ltd., Fukui-shi, Fukui, JP;
Abstract
A color developer for heat sensitive recording which comprises 0.5 to 5 parts by mass of 3-allyl-4-allyloxy-4'-hydroxydiphenylsulfone, 4-allyloxy-3′-allyl-4′-hydroxydiphenylsulfone or a mixture of these compounds per 100 parts by mass of 4-allyloxy-4′-hydroxydiphenylsulfone, a process for producing the color developer and a heat sensitive recording material comprising the color developer in the heat sensitive color forming layer. The color developer and the recording material suppress fog on the background and exhibit excellent color forming property and storage property of image portions.