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:
Sep. 28, 1993
Filed:
Apr. 05, 1991
Applicant:
Inventor:
Richard L Bloom, Woodville, WI (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N / ; B01D / ; B01D / ;
U.S. Cl.
CPC ...
422174 ; 422181 ; 55484 ; 55DI / ; 55DI / ; 60303 ;
Abstract
An efficient, economical, compact diesel particulate filter comprising a casing comprising a plurality of perforated, supported, rigid tubes wherein the perforated surface of each tube is covered by a filtering element comprising substantially helically cross-wound inorganic yarn, and wherein the yarn is cross-wound to provide four-sided openings.