Surgery – Respiratory method or device – Means for removing substance from respiratory gas
Patent
1989-09-29
1990-11-13
Burr, Edgar S.
Surgery
Respiratory method or device
Means for removing substance from respiratory gas
12820619, 12820613, A62B 710, A62B 1700, A62B 1800
Patent
active
049694570
ABSTRACT:
A face mask (10) is provided for covering the mouth and nose of a wearer (14). The mask (10) prevents the passage of liquid from external to the mask to the face of the wearer (14). The mask (10) has four layers including a special low density polyethylene barrier (26). The barrier (26) prevents the passage of liquid in at least one direction while freely allowing the passage of gases in both directions.
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"The Condensed Chemical Dictionary", .COPYRGT.1961, pub. by Reinhold Publishing Corp., N.Y., Sixth Ed., pp. 826, 827, 910-911.
Brunson Welton K.
Caldwell Darrell S.
Hubbard Vance M.
Asher Kimberly L.
Burr Edgar S.
Tecnol, Inc.
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