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:
Mar. 26, 2019
Filed:
Jun. 09, 2015
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Nathan E. Schultz, Lakeland, MN (US);
Fuming B. Li, Woodbury, MN (US);
John M. Sebastian, Oakdale, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D04H 1/56 (2006.01); D06M 10/02 (2006.01); B01D 46/00 (2006.01); D06M 10/00 (2006.01); D04H 1/4291 (2012.01); B01D 39/16 (2006.01); D06B 1/02 (2006.01); D06B 5/08 (2006.01);
U.S. Cl.
CPC ...
D04H 1/56 (2013.01); B01D 39/1623 (2013.01); B01D 46/0032 (2013.01); D04H 1/4291 (2013.01); D06B 1/02 (2013.01); D06B 5/08 (2013.01); D06M 10/00 (2013.01); D06M 10/025 (2013.01); B01D 2239/0435 (2013.01); B01D 2239/0618 (2013.01); B01D 2239/0622 (2013.01); B01D 2239/0627 (2013.01); D06B 2700/14 (2013.01);
Abstract
Electret webs include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is a fused aromatic thiourea, a fused aromatic urea compound, or a combination thereof. The change-enhancing additive may also include a hindered amine light stabilizer compound. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.