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:
Nov. 23, 2004
Filed:
Sep. 03, 2002
Applicant:
Inventors:
Matthew Joseph Chinn, Swindon, GB;
Laurence Anthony Pears, Salisbury, GB;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 5/304 ; B01D 3/920 ;
U.S. Cl.
CPC ...
B01D 5/304 ; B01D 3/920 ;
Abstract
A personal respirator has a face mask and is provided with a filter unit comprising a canister housing contiguous layers of novel filter material. The filter material is suitable for both particulate and vapor filtration, and comprises a composite of first and second groups of chopped fibres, the fibres of the first group having a relatively large diameter (about 7×10 m) and the second group having a relatively small diameter (about 0.5×10 m).