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:
Sep. 30, 2025
Filed:
Jan. 16, 2020
Lg Chem, Ltd., Seoul, KR;
Kyung Ryun Ka, Daejeon, KR;
Su Jin Park, Daejeon, KR;
Sang Joon Lee, Daejeon, KR;
Je An Lee, Daejeon, KR;
LG ENERGY SOLUTION, LTD., Seoul, KR;
Abstract
A separator having a polyolefin substrate, first coating layer including first inorganic particles on at least one surface of the polyolefin substrate and a second coating layer including second inorganic particles on a surface of the first coating layer opposite the polyolefin substrate. An average particle size of the first inorganic material particles of the first coating layer is greater than an average particle size of the second inorganic material particles of the second coating layer. The first inorganic particles of the first coating layer are 900 nm or more based on D50, and the second inorganic particles of the second coating layer are 10 nm or more and 500 nm or less based on D50.