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:
Jan. 10, 2023
Filed:
Sep. 28, 2018
Applicant:
Lg Chem, Ltd., Seoul, KR;
Inventors:
Su Youn Han, Daejeon, KR;
Byoung Hyoun Kim, Daejeon, KR;
Dong Hyun Kim, Daejeon, KR;
Soo Ah Nam, Daejeon, KR;
Bora Shin, Daejeon, KR;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
G01N 30/06 (2006.01); G01N 33/44 (2006.01); G01N 30/02 (2006.01); G01N 30/62 (2006.01);
U.S. Cl.
CPC ...
G01N 30/06 (2013.01); G01N 33/442 (2013.01); G01N 2030/027 (2013.01); G01N 2030/067 (2013.01); G01N 2030/626 (2013.01);
Abstract
An analysis method is provided, wherein a measurement sample containing a diamine and an acid dianhydride can be obtained without a separate methyl derivatization process. The analysis method includes pretreating a polyimide film including the polyimide which is a poorly soluble polymer with DMAc after hydrolysis, and determining an amount of monomers contained in the polyimide film.