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. 27, 2025
Filed:
Dec. 19, 2019
Applicant:
Lg Chem, Ltd., Seoul, KR;
Inventors:
Kyung Min Min, Daejeon, KR;
Sung Kyoung Kim, Daejeon, KR;
Seung Young Park, Daejeon, KR;
Sang Cheol Shin, Daejeon, KR;
Assignee:
LG Chem, Ltd., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 64/40 (2006.01); B01D 67/00 (2006.01); B01D 69/10 (2006.01); B01D 69/12 (2006.01); B01D 71/10 (2006.01); B01D 71/26 (2006.01); B01J 31/12 (2006.01); C08G 64/34 (2006.01);
U.S. Cl.
CPC ...
C08G 64/406 (2013.01); B01D 67/00931 (2022.08); B01D 69/107 (2022.08); B01D 69/12 (2013.01); B01D 71/10 (2013.01); B01D 71/261 (2022.08); B01D 71/262 (2022.08); B01J 31/12 (2013.01); C08G 64/34 (2013.01); B01D 2311/14 (2013.01); B01D 2325/0283 (2022.08);
Abstract
The present disclosure relates to a method for separating an organic zinc catalyst dispersed in a polyalkylene carbonate resin solution by filtering the polyalkylene carbonate resin solution using a composite filtering membrane, which is a composite material comprising a hydroxyl group-containing material and polyolefin material and has a form in which one or both surfaces of the polyolefin material is coated with the hydroxyl group-containing material.