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:
Jul. 28, 2020
Filed:
Oct. 11, 2016
3m Innovative Properties Company, St. Paul, MN (US);
Jonathan F. Hester, Hudson, WI (US);
Angelines A. Castro Forero, Hudson, WI (US);
Gregory M. Jellum, Marine on St. Croix, MN (US);
Jerald K. Rasmussen, Woodville, WI (US);
Kannan Seshadri, Woodbury, MN (US);
Clinton P. Waller, Jr., White Bear Lake, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Described herein is a filtration media comprising: (i) a first filtration medium comprising an anion exchange nonwoven substrate, wherein the anion exchange nonwoven substrate comprises a plurality of quaternary ammonium groups; and (ii) a second filtration medium comprising a functionalized microporous membrane wherein the functionalized microporous membrane comprises a plurality of guanidyl groups; wherein the first filtration medium is positioned upstream of the second filtration medium.