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:
Apr. 17, 2001
Filed:
Jan. 20, 1995
Applicant:
Inventors:
Peter O. Rekow, Woodbury, MN (US);
Thomas W. Holmquist-Brown, St. Paul, MN (US);
David L. Braun, Lake Elmo, MN (US);
Vaughn B. Grannis, Inver Grove Heights, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A62B 2/302 ; A62B 7/10 ;
U.S. Cl.
CPC ...
A62B 2/302 ; A62B 7/10 ;
Abstract
A respirator,includes a compressible filter element,, a filter element retainer,, and a face piece,. The respirator is unique in that the filter element,compresses when installed in the retainer,, allowing a friction fit to be maintained between the filter element,and retainer,. The friction fit enables the filter element,to be readily replaced when its service life has expired.