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. 03, 1990
Filed:
Aug. 05, 1987
Yoshiaki Suzuki, Kanagawa, JP;
Gouichi Hayashi, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
An infrared absorbing composition is disclosed, which contains at least one compound selected from compounds represented by formula (I) ##STR1## Compounds represented by formula (II) ##STR2## and compounds represented by formula (III) ##STR3## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.10, R.sup.11, R.sup.12, R.sup.13, R.sup.14, R.sup.17, R.sup.18, R.sup.19, R.sup.20 and R.sup.21, which may be the same or different, each represents a halogen atom, a hydrogen atom, or a substituted or unsubstituted alkyl, aryl, cycloalkyl or heterocyclic group which is bonded to the carbon atom of the benzene ring either directly or via a divalent linking group, or any pair of R.sup.1 to R.sup.5, R.sup.10 to R.sup.14, R.sup.17 to R.sup.21 having adjacent positions on the same ring combine to form a substituted or unsubstituted ring; R.sup.6 and R.sup.7, which may be the same or different, each represents an alkyl group or a substituted or unsubstituted aryl group; and R.sup.8, R.sup.9, R.sup.15, R.sup.16, R.sup.22 and R.sup.23, which may be the same or different, each represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a cyano group; or R.sup.8 and R.sup.9, R.sup.15 and R.sup.16, or R.sup.22 and R.sup.23 combine to form a substituted or unsubstituted ring, which may be condensed with one or more additional rings or ring systems which may be further substituted with substituents. The composition selectively absorbs far to near infrared rays having wavelengths of 600 nm or more and are useful as an optical filter.