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:
Aug. 09, 2022
Filed:
Dec. 07, 2018
Applicant:
Lg Chem, Ltd., Seoul, KR;
Inventors:
Byungguk Kim, Daejeon, KR;
Youngsik Eom, Daejeon, KR;
Sanggon Kim, Daejeon, KR;
Yunah Yu, Daejeon, KR;
Hyungsam Choi, Daejeon, KR;
Assignee:
LG CHEM, LTD., Seoul, KR;
Primary Examiner:
Int. Cl.
CPC ...
C08J 5/18 (2006.01); C08G 73/14 (2006.01);
U.S. Cl.
CPC ...
C08G 73/14 (2013.01); C08J 5/18 (2013.01); C08J 2379/08 (2013.01);
Abstract
The present invention relates to a polyamide-imide resin film having a low birefringence index, including: a polyamide-imide block copolymer containing an amide repeating unit to which an isophthaloyl group and an aromatic diamine residue are bonded; an imide repeating unit; and a trivalent functional group containing an aromatic tricarbonyl group.