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. 08, 2008
Filed:
Nov. 24, 2000
Chiaki Kasada, Okayama, JP;
Toshio Kawata, Okayama, JP;
Kentaro Yano, Okayama, JP;
Shigeo Yasui, Okayama, JP;
Chiaki Kasada, Okayama, JP;
Toshio Kawata, Okayama, JP;
Kentaro Yano, Okayama, JP;
Shigeo Yasui, Okayama, JP;
Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyuko, Okayama, JP;
Abstract
The present invention provides styryl dyes which have absorption maxima at a wavelength of 400 nm or less and are sensitive to a laser beam with a wavelength of 450 nm or less, light absorbents and optical recording media which comprise the styryl dyes, and a process for producing the styryl dyes which comprises reacting with an aldehyde compound a quaternary ammonium salt of nitrogen atom containing heterocyclic compound having an active methyl or active methylene group.