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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.:

US 11376554 B1

PDFFull Text
Date of Patent:
Jul. 05, 2022

Filed:

Dec. 18, 2017

Porous polytetrafluoroethylene membrane, and waterproof air-permeable membrane and waterproof air-permeable member including the same

Applicant:

Nitto Denko Corporation, Ibaraki, JP;

Inventors:

Teppei Tezuka, Osaka, JP;

Youzou Yano, Osaka, JP;

Kazuhiro Omura, Osaka, JP;

Tomoyuki Kasagi, Osaka, JP;

Assignee:

NITTO DENKO CORPORATION, Osaka, JP;

Attorney:

Hamre, Schumann, Mueller & Larson, P.C.

Primary Examiner:

Anthony R Shumate

Int. Cl.
CPC ...
B01D 53/22 (2006.01); B01D 71/36 (2006.01); B01D 53/26 (2006.01); B01D 69/02 (2006.01); B01D 69/10 (2006.01); C08J 5/18 (2006.01); C08J 9/228 (2006.01); H05K 5/02 (2006.01); B29D 99/00 (2010.01); C08J 3/11 (2006.01); B29K 27/18 (2006.01);
U.S. Cl.
CPC ...
B01D 71/36 (2013.01); B01D 53/268 (2013.01); B01D 69/02 (2013.01); B01D 69/10 (2013.01); B29D 99/005 (2013.01); C08J 3/11 (2013.01); C08J 5/18 (2013.01); C08J 9/228 (2013.01); H05K 5/0213 (2013.01); B01D 2325/02 (2013.01); B29K 2027/18 (2013.01); C08J 2327/18 (2013.01);
Abstract

A porous polytetrafluoroethylene (PTFE) membrane of the present disclosure is a membrane having an average fibril length of 50 μm or more, having an average node length 5 or more times larger than the average fibril length, and having an average node area ratio of 5% or less. The porous PTFE membrane of the present disclosure, when attached as a waterproof air-permeable membrane to a housing of an electrical component or electrical device, allows water vapor residing inside the housing to be quickly discharged out of the housing.

Find Patent Forward Citations

Tezuka, Teppei. (2022). Porous polytetrafluoroethylene membrane, and waterproof air-permeable membrane and waterproof air-permeable member including the same (U.S. Patent No. 11376554). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11376554

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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