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. 20, 2008
Filed:
Mar. 24, 2004
James Huang, Taichung, TW;
William Chou, Taichung, TW;
David Chou, Taichung, TW;
Juin-yih Lai, Taoyuan, TW;
Kueir-rarn Lee, Taoyuan, TW;
Da-ming Wang, Taoyuan, TW;
Ruoh-chyu Ruaan, Taoyuan, TW;
Tian-tsair Wu, Taoyuan, TW;
James Huang, Taichung, TW;
William Chou, Taichung, TW;
David Chou, Taichung, TW;
Juin-Yih Lai, Taoyuan, TW;
Kueir-Rarn Lee, Taoyuan, TW;
Da-Ming Wang, Taoyuan, TW;
Ruoh-Chyu Ruaan, Taoyuan, TW;
Tian-Tsair Wu, Taoyuan, TW;
Yeu Ming Tai Chemical Industrial Co., Ltd., Taichung, TW;
Abstract
The present invention provides an asymmetric porous PTFE membrane for a filter having little change over time and conventionally known properties of a porous PTFE molded article such as water permeability resistance, air permeability, sealing properties and electric properties, in which collection efficiency, air permeability and pressure loss are improved. Specifically, the present invention relates to an asymmetric porous PTFE membrane for a filter comprising a dense skin layer and a continuously foamed porous layer, wherein