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. 30, 1996
Filed:
Feb. 04, 1994
Applicant:
Inventors:
Teijiro Kitao, Tondabayashi, JP;
Hironori Oda, Nagoya, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430345 ; 43027016 ; 4302711 ; 430341 ; 4304951 ;
Abstract
An optical information recording medium improved in storage stability and thermal stability, having a base and a recording layer, the recording layer containing a spiropyran compound and at least one carboxylic acid metallic complex expressed by general formulae I! and II!: ##STR1## where M represents a metallic element and each of R.sub.11 and R.sub.12 represents an alkylene group, an alkylidene group, an aromatic ring, an aliphatic ring, or a heterocyclic ring.