Surgery – Respiratory method or device – Means for removing substance from respiratory gas
Reexamination Certificate
2000-10-06
2008-09-30
DeMille, Danton (Department: 3771)
Surgery
Respiratory method or device
Means for removing substance from respiratory gas
C128S206120, C128S207120
Reexamination Certificate
active
07428903
ABSTRACT:
A filtering face mask that has a mask body and an exhalation valve. The mask body is adapted to fit over the nose and mouth of a wearer. The exhalation valve is positioned on the mask body substantially opposite to a wearer's mouth. The exhalation valve comprises a valve seat that has a seal surface, an orifice that is circumscribed by the seal surface, and cross members that extend across the orifice to create a plurality of openings within the orifice. The valve also includes a single flexible flap that has a fixed portion and a free portion and first and second opposing ends. The first end of the single flexible flap is associated with the fixed portion of the flap so as to remain at rest during an exhalation, and the second end being associated with the free portion of the flexible flap so as to be lifted away from the seal surface during an exhalation. The second end also is located below the first end when the filtering face mask is worn on a person. The flexible flap would normally assume a flat configuration when no forces are applied to it, but the flexible flap has a curved profile when viewed from a side elevation and is pressed towards the seal surface in an abutting relationship therewith when a fluid is not passing through the orifice.
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Abstracts for JP 58-168314 and JP 55-168359.
Sample of Moldex 2300 Series Respiratory Mask.
Prior Art Statement.
Moldex's Revised Prior Art Statement of Feb. 21, 2006.
Abstract for Japanese 55-168359.
Abstract for Japanese 58-168314.
Ferguson Anthony B.
Grannis Vaughn B.
Japuntich Daniel A.
Seppala Harold J.
3M Innovative Properties Company
DeMille Danton
Hanson Karl G.
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