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:
Aug. 02, 2011
Filed:
Jun. 22, 2007
Applicants:
Seyed A. Angadjivand, Woodbury, MN (US);
John M. Brandner, St. Paul, MN (US);
James E. Springett, Webster, WI (US);
Inventors:
Seyed A. Angadjivand, Woodbury, MN (US);
John M. Brandner, St. Paul, MN (US);
James E. Springett, Webster, WI (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D04H 3/00 (2006.01); D04H 3/16 (2006.01); D02G 3/04 (2006.01); D01D 5/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A molded respirator and method of making are disclosed, wherein the molded respirator is made from a porous nonwoven web containing meltblown fibers and staple fibers. The meltblown fibers may be present as a bimodal mixture of microfibers and mesofibers, and comprise an intermingled mixture with staple fibers further intermingled therein. The molded respirator may also contain at least one secondary filtration layer.