US PATENT SUBCLASS 128 / 201.17
.~.~ Mask with porous lower filtering portion and impervious upper portion shielding user's eyeglasses from exhaled breath

Current as of: June, 1999
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128 /   HD   SURGERY

200.24  DF  RESPIRATORY METHOD OR DEVICE {32}
201.15  DF  .~ Means for keeping viewing member (e.g., eyeglass, transparent face shield, etc.) clear {2}
201.17.~.~ Mask with porous lower filtering portion and impervious upper portion shielding user's eyeglasses from exhaled breath

DEFINITION

Classification: 128/201.17

Mask with porous lower filtering portion and impervious upper portion shielding user's eyeglasses from exhaled breath:

(under subclass 201.15) Subject matter including a mask with a porous lower filtering portion and an impervious upper portion shielding the user's eyeglasses from the exhaled breath.

(1) Note. Devices in this subclass are usually a "surgical-type" mask formed entirely of cloth, etc., with an impervious upper portion.