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:
Oct. 04, 2022
Filed:
Jul. 20, 2020
Applicant:
Corum Inc., Taipei, TW;
Inventor:
Nai-Hsuan Hsu, Taipei, TW;
Assignee:
CORUM INC., Taipei, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/38 (2006.01); C07C 55/18 (2006.01);
U.S. Cl.
CPC ...
C07C 51/38 (2013.01); C07C 55/18 (2013.01);
Abstract
A process for preparing azelaic acid is disclosed. In particular, the process for preparing azelaic acid is an ozone free process. The process for preparing azelaic acid comprises a step of decarboxylation of tetra-carboxylic acid in the presence of a organic sulfonic acid.