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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 12409640 B1

PDFFull Text
Date of Patent:
Sep. 09, 2025

Filed:

May. 04, 2023

Waterproofing and breathable polyolefin roofing membrane by extrusion lamination and sequential stretching

Applicants:

Ddp Specialty Electronic Materials Us, Llc., Wilmington, DE (US);

Eidca Specialty Products Company, Kingston, CA;

Dupont (China) Research & Development and Management Co., Ltd., Shanghai, CN;

Inventors:

Wenyi Huang, Wilmington, DE (US);

Lisa Bertolo, Kingston, CA;

Jiaqi Wang, Shanghai, CN;

Assignee:

EIDCA SPECIALTY PRODUCTS COMPANY, KINGSTON, ONTARIO, CA;

Attorneys:

Dow DuPont

BLAKE T BIEDERMAN

JOHN PISKORSKI

STEVEN BENJAMIN

HERALD KNIGHT

JONATHAN BASKIN

MARIA M KOURTAKIS

MICHAEL NOONAN

S CAIRNS

HONG XU

MATTHEW FEWKES

ROGER MIAO

SHAORONG CHEN

JENAFER EVANS

STEPHEN GOMBITA

GORDON CAMPBELL

Primary Examiner:

Vishal I Patel

Int. Cl.
CPC ...
B32B 27/12 (2006.01); B29C 48/00 (2019.01); B29C 48/07 (2019.01); B29C 48/154 (2019.01); B29C 71/02 (2006.01); B32B 5/02 (2006.01); B32B 27/32 (2006.01); B32B 37/15 (2006.01); B32B 38/00 (2006.01); B29K 23/00 (2006.01); B29K 105/00 (2006.01); E04D 5/10 (2006.01);
U.S. Cl.
CPC ...
B32B 27/12 (2013.01); B29C 48/0018 (2019.02); B29C 48/07 (2019.02); B29C 48/154 (2019.02); B29C 71/02 (2013.01); B32B 5/022 (2013.01); B32B 27/32 (2013.01); B32B 37/153 (2013.01); B32B 38/0012 (2013.01); B32B 38/0036 (2013.01); B29C 2071/022 (2013.01); B29K 2023/06 (2013.01); B29K 2023/12 (2013.01); B29K 2105/0088 (2013.01); B29K 2713/00 (2013.01); B32B 2038/0028 (2013.01); B32B 2038/0048 (2013.01); B32B 2250/40 (2013.01); B32B 2260/021 (2013.01); B32B 2260/046 (2013.01); B32B 2262/0253 (2013.01); B32B 2262/0276 (2013.01); B32B 2262/124 (2021.05); B32B 2270/00 (2013.01); B32B 2305/18 (2013.01); B32B 2307/516 (2013.01); B32B 2307/518 (2013.01); B32B 2307/54 (2013.01); B32B 2307/718 (2013.01); B32B 2307/7246 (2013.01); B32B 2307/7376 (2023.05); B32B 2307/748 (2013.01); B32B 2323/10 (2013.01); B32B 2419/06 (2013.01); E04D 5/10 (2013.01);
Abstract

Reinforced microporous polyolefin sheets comprise one or more layers of a microporous polyolefin and a non-woven fabric at least partially embedded in the microporous polyolefin. The reinforced microporous polyolefin sheet is made in an extrusion lamination process by which a polyolefin sheet and non-woven fabric are laminated, followed by sequential cold and hot stretching steps to produce the micropores.

Find Patent Forward Citations

Huang, Wenyi. (2025). Waterproofing and breathable polyolefin roofing membrane by extrusion lamination and sequential stretching (U.S. Patent No. 12409640). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12409640

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

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