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:
Mar. 30, 1976
Filed:
May. 20, 1974
Takashi Akamatsu, Ashiya, JA;
Koichi Koga, Toyonaka, JA;
Mitsuru Kondo, Kawanishi, JA;
Makoto Miyake, Nishinomiya, JA;
Hiroshi Twasaki, Takatsuki, JA;
Masatoshi Matsuo, Ibaragi, JA;
Seiji Hotta, Hirakata, JA;
Isao Yuji, Takarazuka, JA;
Yukiaki Ito, Minoo, JA;
Sumitomo Chemical Company, Ltd., Osaka, JA;
Kanzaki Paper Manufacturing Co., Ltd., Tokyo, JA;
Abstract
Novel benz[c]fluoran compounds such as 2-phenylamino-8-diethylamino-benz[c]fluoran, 2-(2',4',6'-trimethylphenylamino)-8-diethylamino-benz[c]fluoran and N-[8-diethylaminobenz[c]fluoran-2-yl]-N-[6-diethylaminofluoran-2-yl]amine, which are useful as a coloring material for record material systems such as pressure-sensitive copying paper or heat-sensitive copying paper, wherein colored images formed by an electron-donoracceptor color-forming reaction between coloring material and acidic material.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile