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:
May. 24, 2022
Filed:
Jun. 11, 2019
Tokuyama Corporation, Yamaguchi, JP;
Jeol Ltd., Tokyo, JP;
Makoto Satou, Yamaguchi, JP;
Misao Matsushige, Yamaguchi, JP;
Seketsu Fukuzawa, Tokyo, JP;
Masaki Takiwaki, Tokyo, JP;
TOKUYAMA CORPORATION, Yamaguchi, JP;
JOEL LTD., Tokyo, JP;
Abstract
Provided is a method for industrially producing a triazolidinedione compound at a high purity and a high yield. A precipitation step for preparing a solution that contains a triazolidinedione compound represented by formula (1) and precipitating the triazolidinedione compound therefrom is performed. In this step, the pH of the solution is adjusted to 3.0 to 8.5 and the solution is prepared so as to contain 3-15 parts by volume of solvents for 1 part by mass of the triazolidinedione compound. (In the formula, Ris a substituted or unsubstituted amino group-bearing organic group.)