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:
Nov. 22, 2016
Filed:
Mar. 30, 2015
Hyundai Motor Company, Seoul, KR;
Jinmyung Frictech Co., Ltd., Incheon, KR;
Yoon Cheol Kim, Suwon-si, KR;
Eun Pa Cho, Bucheon-si, KR;
Young Taek Oh, Seoul, KR;
Sung Jin Hong, Incheon, KR;
Hyundai Motor Company, Seoul, KR;
Jinmyung Frictech Co., Ltd., Incheon, KR;
Abstract
A multilayer paper-based wet friction material of an automotive auto transmission may improve noise and vibration characteristics, heat resistance, wear resistance, compression resistance, and oil absorbency. The paper-based wet friction material of an automotive auto transmission includes: a first layer using cellulose pulp as a matrix and including a first functional additive; a second layer stacked on the first layer, using the cellulose pulp as the matrix, and including the second functional additive; and a hydrogen bonding layer mediating between the first layer and the second layer. The cellulose pulp of the first and second layers is cotton linter.