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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.:

US 4970021 B1

PDFFull Text
Date of Patent:
Nov. 13, 1990

Filed:

Aug. 29, 1988

Phthalocyanine compounds and utility thereof

Applicant:
Inventors:

Masakatsu Nakatsuka, Yokohama, JP;

Tsutomu Nishizawa, Yokohama, JP;

Takahisa Oguchi, Yokohama, JP;

Hisato Itoh, Yokohama, JP;

Katashi Enomoto, Zushi, JP;

Assignees:

Mitsui Toatsu Chemicals, Incorporated, Tokyo, JP;

Yamamoto Chemicals, Incorporated, Yao, JP;

Attorney:

Oblon, Spivak, McClelland, Maier and Neustadt

Primary Examiner:

John S Maples

Assistant Examiner:

Philip Tucker

Int. Cl.
CPC ...
C09K / ; C09K / ; G03C / ; C09B / ;
U.S. Cl.
CPC ...
25229901 ; 2522991 ; 2522993 ; 540122 ; 540139 ; 540140 ; 430270 ; 430495 ; 430944 ; 430945 ;
Abstract

Phthalocyanine compounds are described, which are represented by the following general formula (I): ##STR1## wherein R.sub.1 -R.sub.8 are individually a hydrogen atom or an alkyl or aryl group, a-h stand individually for an integer of 1-20, and M denotes two hydrogen atoms or a metal atom, metal halide, metal oxide, metal hydroxide, dialkylmetal, diarylmetal, bis(alkyloxy)metal or bis(trialkylsilyloxy)metal. Optical recording media and liquid crystal display panels, which contain at least one of the phthalocyanine compounds, are also described.

Find Patent Forward Citations

Nakatsuka, Masakatsu. (1990). Phthalocyanine compounds and utility thereof (U.S. Patent No. 4970021). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4970021

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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