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:
Apr. 04, 2017
Filed:
Oct. 21, 2014
Applicant:
E I Du Pont DE Nemours and Company, Wilmington, DE (US);
Inventors:
Tao Huang, Downingtown, PA (US);
Hyun Sung Lim, Midlothian, VA (US);
Wai-Shing Yung, Chadds Ford, PA (US);
Assignee:
E I DU PONT DE NEMOURS AND COMPANY, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B03C 3/28 (2006.01); B01D 39/16 (2006.01);
U.S. Cl.
CPC ...
B03C 3/28 (2013.01); B01D 39/1623 (2013.01); B01D 2239/0435 (2013.01); B01D 2239/10 (2013.01); B01D 2239/125 (2013.01); B01D 2239/1233 (2013.01);
Abstract
The present invention is directed toward an improved air filtration medium comprising a single layer polymeric nanofibrous web comprising a single source randomly intermingled fiber network with electrostatic charge up to −20 kV, a filtration efficiency range from about 70% to about 99.99%, and an air resistance less than about 2.5 mm wg for 0.3 diameter micron particles. The air filtration medium is made from a centrifugal melt spinning process.