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:
Dec. 08, 2009
Filed:
Aug. 13, 2002
Gregory K. Jones, Lebanon, OH (US);
Larry Hughey Mcamish, Cincinnati, OH (US);
Pai-chuan Wu, Cincinnati, OH (US);
Kenneth L. Lilly, Lebanon, OH (US);
Christopher Aaron Shelley, Cincinnati, OH (US);
Mark Andrew Wendorf, Mason, OH (US);
Gregory K. Jones, Lebanon, OH (US);
Larry Hughey McAmish, Cincinnati, OH (US);
Pai-Chuan Wu, Cincinnati, OH (US);
Kenneth L. Lilly, Lebanon, OH (US);
Christopher Aaron Shelley, Cincinnati, OH (US);
Mark Andrew Wendorf, Mason, OH (US);
Clopay Plastic Products Company, Inc., Mason, OH (US);
Abstract
Multilayer microporous films comprise first and second microporous film layers. The first film layer has a first maximum pore size and the second film layer has a second maximum pore size different from the first maximum pore size. In a more specific embodiment, the multilayer microporous films comprise coextruded first, second and third microporous film layers. One of the first, second and third film layers has a maximum pore size smaller than the respective maximum pore sizes of the remaining layers of the multilayer film or larger than the respective maximum pore sizes of the remaining layers of the multilayer film, and the one layer does not have an unconstrained surface in the multilayer film. Methods for producing multilayer microporous films provide a first film layer having a maximum pore size upon stretching which is different from that of a second film layer upon stretching.