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:
Apr. 14, 2025
Filed:
Aug. 20, 2020
Applicant:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Inventors:
Assignee:
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 263/10 (2005.12); C07D 257/04 (2005.12);
U.S. Cl.
CPC ...
C07C 263/10 (2012.12); C07D 257/04 (2012.12);
Abstract
The present specification discloses a method for producing an isocyanate compound. The invention relates to a method for producing the compound represented by formula (2), or a salt thereof is mixed with phosgene(s) under a condition such that the pH of the aqueous layer is 1 or less, in the presence of a water-immiscible solvent and water.