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:
Feb. 05, 1980
Filed:
Aug. 07, 1978
Applicant:
Inventors:
Reynold F Durre, Minneapolis, MN (US);
Richard P Berven, Minneapolis, MN (US);
Assignee:
Donaldson Company, Inc., Minneapolis, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
55499 ; 55502 ; 55381 ; 55521 ; 2104 / ;
Abstract
A filter including a resilient frame, a hollow body of pleated paper, and end closures, molded together to make a flexible unitary structure which maintains its shape and has the efficiency characteristics of the paper medium.