Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Reexamination Certificate
2006-07-31
2010-12-28
Ruthkosky, Mark (Department: 1782)
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
C264S115000
Reexamination Certificate
active
07858163
ABSTRACT:
A molded respirator is made from a monocomponent monolayer nonwoven web containing a bimodal mass fraction/fiber size mixture of intermingled continuous monocomponent polymeric microfibers and larger size fibers of the same polymeric composition. The respirator is a cup-shaped porous monocomponent monolayer matrix whose matrix fibers are bonded to one another at at least some points of fiber intersection. The matrix has a King Stiffness greater than 1 N. The respirator may be formed without requiring stiffening layers, bicomponent fibers, or other reinforcement in the filter media layer.
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Angadjivand Seyed A.
Brandner John M.
Fox Andrew R.
Lindquist Timothy J.
Springett James E.
3M Innovative Properties Company
Kashnikow Erik
Ruthkosky Mark
Wood Kenneth B.
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