Patent №
US 4,835,291
Granted
1989-05-30
Filed 1987
Owner
YAMADA CHEMICAL CO., LTD.
Lab
—
AI components
1
vision
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
07037665
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.
AI classification
Ownership
YAMADA CHEMICAL CO., LTD.
assignment · 47150630
Assignors
KAWAI, HAJIME, FUJINO, YOSHIHARU, SHIMIZU, YOUJI, NIEDA, SEIICHI, GENDAI, KAZUHIKO, TSUNEMITSU, KATSUHIKO
On an employer assignment, the assignors are typically the inventors.