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:
Jun. 30, 1998
Filed:
Jun. 06, 1996
Applicant:
Inventors:
Akio Karasawa, Yokohama, JP;
Hisato Itoh, Omuta, JP;
Assignee:
Mitsui Toatsu Chemicals, Inc., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03F / ;
U.S. Cl.
CPC ...
430-7 ; 4284111 ; 359885 ;
Abstract
Dyestuffs represented by the below-described formula (1), that is, dyestuffs formed of a chromophoric nucleus and a bisphenol introduced therein have excellent solubility in solvents and binder resins, and can provide color filters having excellent transmittance characteristics and durability. ##STR1## wherein Dye represents a chromophoric nucleus, X represents a direct bond or a divalent connecting group, R.sup.1 to R.sup.10 and n are defined with the provision that one of R.sup.9 and R.sup.10 has 3 or more carbon atoms.