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:
Mar. 17, 1992
Filed:
Mar. 01, 1991
Applicant:
Inventors:
Robert Sassa, Newark, DE (US);
Todd Johnson, Wilmington, DE (US);
Richard Winkelmayer, North East, MD (US);
Assignee:
W. L. Gore & Associates, Inc., Newark, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
55 97 ; 55302 ; 55486 ; 55514 ; 55528 ;
Abstract
A filter composite is made of a porous polytetrafluoroethylene (PTFE) and a fabric. The PTFE and fabric are bonded by an adhesive. The adhesive is prevented from penetrating the fabric by employing a coating of an oil and water-repellent material to the surface of the fabric adjacent the adhesive.