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:
Mar. 03, 2009
Filed:
Mar. 23, 2005
Andrew S. Viner, Roseville, MN (US);
Audra A. Conlan, Tyne & Wear, GB;
Brian Cormack, County Durham, GB;
Malcolm R. Watson, County Durham, GB;
Christopher P. Henderson, County Durham, GB;
Desmond T. Curran, County Durham, GB;
Elfed I. Williams, Dyfed, GB;
Andrew S. Viner, Roseville, MN (US);
Audra A. Conlan, Tyne & Wear, GB;
Brian Cormack, County Durham, GB;
Malcolm R. Watson, County Durham, GB;
Christopher P. Henderson, County Durham, GB;
Desmond T. Curran, County Durham, GB;
Elfed I. Williams, Dyfed, GB;
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Method for making a filter cartridge that is suitable for attachment to a respiratory mask. The method comprises the steps of (a) providing a mass of filter material; (b) providing a filter cartridge housing that has an inlet and outlet and a sidewall that includes sheet material; and (c) thermoforming the sheet material of the housing sidewall around at least part of the mass of filter material to place the housing sidewall in direct contact with the mass of filter material to encapsulate the filter material so that fluid is prevented from passing through the filter cartridge from the inlet to the outlet without being filtered by the mass of filter material.