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. 11, 2012
Filed:
Nov. 18, 2009
Douglas E. Weiss, Golden Valley, MN (US);
Clinton P. Waller, Jr., White Bear Lake, MN (US);
Michael R. Berrigan, Oakdale, MN (US);
Andrew W. Rabins, St. Paul, MN (US);
Jeffrey A. Lucas, Clinton, CT (US);
Kannan Seshadri, Woodbury, MN (US);
Catherine A. Bothof, Stillwater, MN (US);
Douglas E. Weiss, Golden Valley, MN (US);
Clinton P. Waller, Jr., White Bear Lake, MN (US);
Michael R. Berrigan, Oakdale, MN (US);
Andrew W. Rabins, St. Paul, MN (US);
Jeffrey A. Lucas, Clinton, CT (US);
Kannan Seshadri, Woodbury, MN (US);
Catherine A. Bothof, Stillwater, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A grafted nonwoven substrate is disclosed having average fiber sizes of 0.7 to 15 microns, and a void volume of 50 to 95%, and a polymer comprising cationic aminoalkyl(meth)acryloyl monomer units grafted to the surface of the nonwoven substrate. The article may be used as a filter element to purify or separate target materials, such as oligonucleotides or monoclonal antibodies (MAb), from a fluid mixture.