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:
Jul. 06, 1993
Filed:
Apr. 20, 1992
Applicant:
Inventors:
Bruce B Hoppenstedt, Bloomington, MN (US);
Wayne M Wagner, Apple Valley, MN (US);
Assignee:
Donaldson Company, Inc., Minneapolis, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
55267 ; 55282 ; 55DI / ; 55DI / ; 219201 ; 219535 ; 338208 ;
Abstract
A filter cartridge with heating element separated from a support member by filter media wherein the heating element has rows of apertures alternately staggered to provide good hoop strength while allowing longitudinal thermal growth and contraction.