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. 06, 1977
Filed:
Dec. 18, 1975
Yutaka Hirai, Ohmuta, JA;
Katsuharu Miyata, Ohmuta, JA;
Tagui Osawa, Ohmuta, JA;
Muneyasu Samecima, Ohmuta, JA;
Ken Mukai, Ohmuta, JA;
Koichi Yoshiura, Ohmuta, JA;
Hidetoshi Mori, Ohmuta, JA;
Mitsui Toatsu Chemicals, Inc., Tokyo, JA;
Abstract
A process for preparing aminoanthraquinones of high purity, which comprises catalytically hydrogenating nitroanthraquinones in the suspended state in an aqueous medium in the presence of a hydrogenating catalyst. In a preferred embodiment, the catalytic hydrogenation may be carried out in the presence of an organic or inorganic base, followed, if desired, by oxidizing the hydrogenation product.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile