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:
May. 30, 1989
Filed:
Apr. 13, 1987
Applicant:
Inventors:
Hajime Kawai, Tsuzuki, JP;
Yoshiharu Fujino, Tsuzuki, JP;
Youji Shimizu, Kyoto, JP;
Seiichi Nieda, Kyoto, JP;
Kazuhiko Gendai, Kyoto, JP;
Katsuhiko Tsunemitsu, Kyoto, JP;
Assignee:
Yamada Chemical Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; B41M / ; B41M / ; B41M / ;
U.S. Cl.
CPC ...
549304 ; 503220 ; 503223 ; 427151 ;
Abstract
Disclosed herein are novel divinyl compounds represented by the formula (I): ##STR1## and a recording-material prepared by utilizing the divinyl compounds. The divinyl compound is in itself almost colorless, extremely stable in the atmosphere and develops rapidly blackish color by a developer. The color image given by the divinyl compound is excellent in light-resistance and moisture-resistance and the letters developed can be read by an optical letter-reading apparatus or a barcord reading apparatus.