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. 06, 1999
Filed:
Sep. 18, 1997
Applicant:
Inventors:
Reiji Ohashi, Tokyo, JP;
Yukiko Ryu, Tokyo, JP;
Tomoaki Nagai, Tokyo, JP;
Hidetoshi Yoshioka, Tokyo, JP;
Assignee:
Nippon Paper Industries, Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
544 64 ; 544126 ; 544225 ; 544226 ; 544327 ; 544328 ; 544329 ; 546-6 ; 546 10 ; 546108 ;
Abstract
A phenanthridine derivative metal complex of formula 1 having a large absorption in the near-infrared range and a reduced absorption in the visible range, which phenanthridine derivative metal complex is used in a transparent recording medium: ##STR1## where M is a metal atom, and X is a negative ion.