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:
Jun. 03, 2003
Filed:
Oct. 22, 2001
Yoshio Taniguchi, Nagano, JP;
Toshiki Koyama, Nagano, JP;
Chihaya Adachi, Hokkaido, JP;
Tomoyasu Saitou, Tokyo, JP;
Makoto Satsuki, Okayama, JP;
Akira Shinpo, Okayama, JP;
Sadaharu Suga, Okayama, JP;
Shizuo Tokito, Tokyo, JP;
Hisayoshi Fujikawa, Aichi, JP;
Koji Noda, Aichi, JP;
Atsushi Miura, Aichi, JP;
Yasunori Taga, Aichi, JP;
Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo, Okayama, JP;
Abstract
4-Cyanocoumarin derivatives which have a distinct sensitivity to visible light, distinct luminescent ability, and satisfactory applicability for photochemical polymerization, dye lasers, and organic electroluminescent elements. Since most of the derivatives have a fluorescent maximum wavelength of 600 to 650 nm, particularly, 610 to 630 nm, they are extremely useful as luminescent agents for organic EL elements which emit visible light in a red-color region, and can be quite useful as luminescent agents in organic EL elements and laser-active substances in dye lasers, as well as luminous bodies as lighting sources for lighting devices, and information displays for visually displaying information.