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:
Mar. 21, 2023
Filed:
Sep. 11, 2018
Applicant:
SK Chemicals Co., Ltd., Gyeonggi-do, KR;
Inventors:
Jae-Il Chung, Gyeonggi-do, KR;
Hyun Jun Cho, Gyeonggi-do, KR;
Han-Seok Kim, Gyeonggi-do, KR;
Deug-Soo Kim, Gyeonggi-do, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 65/46 (2006.01); C08G 65/34 (2006.01);
U.S. Cl.
CPC ...
C08G 65/46 (2013.01); C08G 65/34 (2013.01);
Abstract
Provided are a polytrimethylene ether glycol and a preparation method thereof, wherein various by-products and oligomers may be effectively removed from a polytrimethylene ether glycol product without exposing to a high temperature for a long period of time, and therefore, a molecular weight variation may be reduced due to the removal of various by-products and low molecular weight oligomers.