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. 29, 2016
Filed:
Feb. 24, 2012
Yoshiki Ikeyama, Osaka, JP;
Nobuaki Maruoka, Osaka, JP;
Naofumi Kosaka, Osaka, JP;
Asuka Onohara, Osaka, JP;
Yoshiki Ikeyama, Osaka, JP;
Nobuaki Maruoka, Osaka, JP;
Naofumi Kosaka, Osaka, JP;
Asuka Onohara, Osaka, JP;
NITTO DENKO CORPORATION, Osaka, JP;
Abstract
A gas-permeable filter provided with oil repellency is provided. The gas-permeable filter includes a porous membrane having a surface coated with an oil-repellent agent. The oil-repellent agent includes a linear fluorine-containing hydrocarbon group represented by —RCFCHCFor —RCF, and the porous membrane is a stretched polytetrafluoroethylene (PTFE) porous membrane. Here, Rand Rare each independently an alkylene group having 1 to 12 carbon atoms or a phenylene group. The gas-permeable filter is provided with oil repellency without significant reduction in gas permeability.