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:
Sep. 10, 2002
Filed:
Jul. 30, 1999
Scott G. Norquist, St. Paul, MN (US);
Dennis L. Krueger, Hudson, WI (US);
Alan J. Sipinen, North Oaks, MN (US);
Robert H. Menzies, Hudson, WI (US);
Thomas P. Hanschen, St. Paul, MN (US);
Ronald P. Leseman, Newport, MN (US);
Sharon N. Mitchell, St. Paul, MN (US);
James C. Nygard, St. Paul, MN (US);
Victor P. Thalacker, Stillwater, MN (US);
Jan Ockeloen, Simopsonville, SC (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A die apparatus, a method of using the die apparatus to produce co-extruded polymeric articles, and co-extruded polymeric articles produced using the die apparatus and method are disclosed. The die apparatus includes a hollow vane configured to extrude a material into a chamber within the die, thereby producing a co-extruded web. The co-extruded web has a plurality of distinct, discontinuous phases in the cross-web direction, the phases having a uniform width as shown by a coefficient of variation of less than 8 percent for, any three consecutive phases. The phases are substantially continuous down-web and are surrounded by a matrix having two or more layers.