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:
Jul. 02, 1991
Filed:
Aug. 23, 1989
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A dithiolate metal complex compound having formula [I] ##STR1## wherein each R individually represents an alkyl group having 1 to 6 carbon atoms, a halogen, a halogenated alkyl group having 1 to 6 carbon atoms, an amino group which may be substituted with 1 or 2 alkyl groups each having independently 1 to 4 carbon atoms, or a trifluoromethyl group, M represents a transition metal selected from the group consisting of Ni, Pd, Pt, Co, Cu and Mn, n is an integer of 0 to 4, and A represents the counter cation of the complex compound, a method of producing the same, and an optical information recording medium comprising a recording layer comprising a polymethine dye and the dithiolate metal complex compound are disclosed.