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:
Jan. 19, 2016
Filed:
Dec. 14, 2010
John B. Scheibner, Woodbury, MN (US);
Brent R. Hansen, New Richmond, WI (US);
David F. Slama, Grant, MN (US);
John B. Scheibner, Woodbury, MN (US);
Brent R. Hansen, New Richmond, WI (US);
David F. Slama, Grant, MN (US);
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Abstract
Described herein are microperforated polymeric films comprising: opposed first and second surfaces separated by a first certain distance (); and a plurality of channels perpendicular to the first and second surfaces, wherein a first opening (-) of a channel intersects the first surface and a second opening (-) of the channel intersects the second surface; wherein the diameter of the first opening is larger than the diameter of the second opening and the second openings on the second surface are spaced apart by a second certain distance (); wherein the ratio of the first certain distance to the second certain distance is at least 0.25; and further wherein the second surface has an open area of at least 10%. Also described are methods of making and using such microperforated polymeric films.