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:
Aug. 25, 2026
Filed:
Nov. 04, 2021
Applicant:
Mitsubishi Gas Chemical Company, Inc., Chiyoda-ku, JP;
Inventors:
Yuki Watanabe, Okayama, JP;
Hiroki Sumi, Okayama, JP;
Hideaki Fujita, Okayama, JP;
Goh Nakamura, Okayama, JP;
Tatsuyuki Kumano, Okayama, JP;
Assignee:
MITSUBISHI GAS CHEMICAL COMPANY, INC., Chiyoda-ku, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 45/36 (2006.01); B01J 31/04 (2006.01); B01J 35/27 (2024.01);
U.S. Cl.
CPC ...
C07C 45/36 (2013.01); B01J 31/04 (2013.01); B01J 35/27 (2024.01);
Abstract
A method for producing fluorenone including a pretreatment step of heating fluorene in the presence of a lower aliphatic carboxylic acid, a bromine compound, and a metal catalyst, and an oxidation step of continuously supplying fluorene and oxygen to perform an oxidation reaction, in the order indicated.