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. 04, 2020
Filed:
Sep. 18, 2019
Applicant:
Kyocera Document Solutions Inc., Osaka, JP;
Inventor:
Jun Azuma, Osaka, JP;
Assignee:
KYOCERA Document Solutions Inc., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/60 (2006.01); B01J 31/02 (2006.01);
U.S. Cl.
CPC ...
C07C 51/60 (2013.01); B01J 31/0247 (2013.01); B01J 2231/40 (2013.01); B01J 2531/002 (2013.01);
Abstract
A naphthalenedicarboxylic acid dichloride production method includes causing a reaction between naphthalenedicarboxylic acid and a chlorinating agent at a reaction temperature of 20° C. or higher and 75° C. or lower in presence of a solvent including tetrahydrofuran. The causing a reaction in the naphthalenedicarboxylic acid dichloride production method is preferably performed in presence of N,N-disubstituted formamide.