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:
Aug. 29, 1995
Filed:
Sep. 17, 1992
Applicant:
Inventors:
Hisato Itoh, Yokohama, JP;
Katashi Enomoto, Zushi, JP;
Takahisa Oguchi, Yokohama, JP;
Tsutomu Nishizawa, Yokohama, JP;
Assignees:
Mitsui Toatsu Chemicals, Incorporated, Tokyo, JP;
Yamamoto Chemicals, Incorporated, Yao, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
540139 ; 540140 ; 540135 ;
Abstract
Near-infrared absorbers which contain phthalocyanine derivatives in which the four benzene rings contained in the molecule independently have 1 to 4 substituents are light and thermal resistant and possess high molar extinction coefficients. Such near-infrared absorbers are useful in optical recording media, near-infrared absorption filters, and liquid crystal display devices.