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US 7,101,423 B2Granted
Respiratory air filter
OwnerUlrich Lersch, Petro Nicolisinventors
Life of this patent
Estimating the term…
Abstract
A respiratory filter includes an air-permeable sleeve and at least one filter layer that is arranged in the sleeve and contains activated carbon. The activated carbon contained in the filter layers serves as a gas filter that, by absorption, at least partially removes the noxious gases that are contained in the air inhaled.
Claims31
A respiratory air filter, with an electrostatically charged, air-permeable sleeve and at least one filter layer arranged inside the sleeve and containing activated carbon;
- wherein the sleeve and the at least one filter layer form a deformable pad that can be pressed by the hand of a user in front of a facial feature of the user such as a mouth or nose, and the pad is deformable by pressure thus applied such that it conforms to an individual facial contour in the region of the facial feature such as the mouth or the nose.
Dependencies are inferred from the claim text.