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:
Mar. 21, 1978
Filed:
Mar. 07, 1977
Applicant:
Inventors:
Yoshio Kimura, Kitakyushu, JA;
Yasuhito Goto, Kitakyushu, JA;
Kenzo Ban, Kitakyushu, JA;
Kiyotomi Kosai, Oaza-Nakami, JA;
Haruki Uchida, Kitakyushu, JA;
Kiyoharu Urakawa, Kitakyushu, JA;
Assignee:
Mitsubishi Chemical Industries, Ltd., Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260383 ;
Abstract
Methoxyanthraquinones are produced from the corresponding nitroanthraquinones by reacting a nitroanthraquinone with methanol and an alkali in a reaction medium chiefly comprising methanol at a temperature of 50.degree.-130.degree. C under atmospheric or superatmospheric pressure in the presence of molecular oxygen wherein the dissolved oxygen concentration of the reaction medium is maintained at a value of at least 1 ppm.