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. 02, 2023
Filed:
Sep. 23, 2019
Applicant:
Lg Chem, Ltd., Seoul, KR;
Inventors:
Joon Seok Lee, Daejeon, KR;
So Yeon Kim, Daejeon, KR;
Bumgyu Choi, Daejeon, KR;
Byoung Hyoun Kim, Daejeon, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 30/34 (2006.01); G01N 30/36 (2006.01); G01N 30/74 (2006.01); G01N 30/64 (2006.01);
U.S. Cl.
CPC ...
G01N 30/34 (2013.01); G01N 30/36 (2013.01); G01N 30/64 (2013.01); G01N 30/74 (2013.01);
Abstract
The present invention relates to a dianhydride analysis method, which can reliably analyze a dianhydride having high reactivity and low solubility. In addition, the present invention can analyze the structure of impurities by separating the impurities on the basis of having a similar retention time in HPLC analysis, and can analyze the purity of the dianhydride with or without chromophores.