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:
Feb. 19, 2013
Filed:
Apr. 17, 2006
Graham J. Bostock, Darlington, GB;
John W. Bryant, Durham, GB;
Desmond T. Curran, Durham, GB;
Christopher P. Henderson, Durham, GB;
Dennis L. Krueger, Hudson, WI (US);
James F. Dyrud, New Richmond, WI (US);
Graham J. Bostock, Darlington, GB;
John W. Bryant, Durham, GB;
Desmond T. Curran, Durham, GB;
Christopher P. Henderson, Durham, GB;
Dennis L. Krueger, Hudson, WI (US);
James F. Dyrud, New Richmond, WI (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A personal respiratory protection device that comprises a multilayer body including a stiffening layer, filter media layer(s) and inner or outer cover layer(s). The mask body includes a central portion between first and second portions, the central portion being defined by a fold, bond, weld, seam, or combination thereof and having a width of about 160 to 220 mm and a height of about 30 to 110 mm. The device is capable of being folded flat for storage with the first portion in at least partial face-to-face contact with a surface of the central portion and the second portion contacting a surface of the first portion. When unfolded for use the device is capable of forming a cup-shaped off the face air chamber over the nose and mouth of a wearer.