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. 11, 1978
Filed:
Oct. 18, 1976
Applicant:
Inventors:
Kurt Fischman, New Milford, NJ (US);
Robert Offer, Racine, WI (US);
Bernard Rudner, Ridgewood, NJ (US);
David Shepard, Racine, WI (US);
Assignee:
Tenneco Chemicals, Inc., Saddle Brook, NJ (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
55487 ; 55524 ; 55DI / ; 55DI / ; 55DI / ; 156309 ; 156331 ; 156334 ; 428311 ; 428314 ; 428315 ;
Abstract
A layer of open cell polyurethane foam adhered to a layer of a non-woven fibrous material of fine porosity relative to the foam results in an efficient fluid (e.g., air) filtering medium having a high capacity for retaining particulate contaminants. The combined layers are useful as an air filter element.