The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 1990
Filed:
Oct. 21, 1988
Amad Tayebi, Westford, MA (US);
New England Thermoplastics, Inc., Lawrence, MA (US);
Abstract
A reusable face mask is disclosed that filters particulate matter and noxious and poisonous gasses from breathed air. The face mask has a mask shell that is thermoformed of cross-linked, closed cell foam sheet that is impermeable to air while having good shape retention and elasticity. The mask shell is perforated with multiple holes in its central area to permit inhaled air to pass through the otherwise impermeable shell. The mask shell is stiff enough to support filter mounting apparatus that has an internal potion and an external portion that both cover the multiple holes. Filters made from filter sheet material and having a self-adhesive strip around their periphery are removably attached to the mounting apparatus to filter breathed air. Neither the mounting apparatus nor the filters ever touch the face of the wearer of the face mask. By using two filters, selective combinations of noxious and poisonous gasses, dusts and mists may be filtered from breathed air.