Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
David K. Friday0
John Schlaechter0
Robert J. Puhala0
Wayne E. Ballantyne0
David W. Pike0
Date of Patent
December 25, 2007
0Patent Application Number
105125400
Date Filed
April 25, 2003
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A filter for a gas mask has an elliptical or circular, convex shape to conform to the curvature of the wearer's face, or a planar shape. The filter comprises a double particulate filter element and a double adsorption filter element configured for axial airflow therethrough with a bifurcated flow pattern. The adsorption filter element comprises a granulated charcoal, a composite material having carbon particles combined with binder particles, or an immobilized bed of charcoal granules and EVA-coated fibers.
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