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:
Sep. 12, 1978
Filed:
Jul. 25, 1977
Applicant:
Inventors:
Ryo Matsuura, Yamato, JP;
Shuichi Nakatani, Yokohama, JP;
Kazuya Nagaoka, Yokohama, JP;
Katsuhiko Hioki, Yokohama, JP;
Assignee:
Kawasaki Kasei Chemicals Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
260351 ; 260704 ;
Abstract
Anthrone is produced by an intramolecular condensation of hydroanthraquinone such as tetrahydroanthraquinone or dihydroanthrahydroquinone by heating it in the absence of oxygen with or without an inert solvent.