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:
Nov. 24, 1992
Filed:
Jul. 22, 1991
Katsumi Murofushi, Kawasaki, JP;
Yoshikazu Hosoda, Kawasaki, JP;
Yoke Ai Gan, Kawasaki, JP;
Kunio Kondo, Kawasaki, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
The present invention relates to a near infrared ray-decolorizable recording material comprising a near infrared ray-absorbing cationic dye-borate anion complex having the formula (I): ##STR1## wherein D.sup.+ represents a cationic dye having absorptions in the near infrared region; R.sub.1, R.sub.2, R.sub.3, and R.sub.4 independently represent an alkyl, aryl, alkaryl, allyl, aralkyl, alkenyl, alkynyl, silyl, alicyclic, or saturated or unsaturated heterocyclic group, substituted alkyl, substituted aryl, substituted alkaryl, substituted allyl, substituted aralkyl, substituted alkenyl, substituted alkynyl, or substituted silyl, with the proviso that at least one of R.sub.1, R.sub.2, R.sub.3, and R.sub.4 represents an alkyl group having 1 to 8 carbon atoms.