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:
Feb. 20, 1979
Filed:
Dec. 15, 1977
Applicant:
Inventors:
Seiji Takeuchi, Shizuoka, JP;
Sadayoshi Matsui, Shimizu, JP;
Assignee:
Ihara Chemical Industry Co., Ltd., Shizuoka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
2603145 ;
Abstract
Copper phthalocyanines are produced by reacting a phthalic anhydride or phthalimide with a copper compound and urea in the presence of a catalyst in a polyalkyl-monochlorobenzene having at least two lower alkyl groups and having the formula ##STR1## wherein R.sub.1 and R.sub.2 respectively represent a lower alkyl group having 1 to 3 carbon atoms; R.sub.3 and R.sub.4 respectively represent hydrogen atom or a lower alkyl group having 1 to 3 carbon atoms.
Takeuchi, Seiji. (1979). Process for producing copper phthalocyanines (U.S. Patent No. 4140695). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4140695
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile