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:
May. 21, 2002
Filed:
May. 19, 2000
Applicant:
Inventors:
John Joseph Rabasco, Allentown, PA (US);
Ronald Bernal Jones, Allentown, PA (US);
William Edward Lenney, Allentown, PA (US);
George Davidowich, Allentown, PA (US);
Assignee:
Air Products Polymers, L.P., Allentown, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 7/138 ; B01D 3/900 ;
U.S. Cl.
CPC ...
B01D 7/138 ; B01D 3/900 ;
Abstract
High performance filters comprise a basestock impregnated with an aqueous based poly(vinyl alcohol) graft emulsion copolymer as binder. The aqueous based poly(vinyl alcohol) graft emulsion copolymer binder is prepared by graft polymerizing one or more ethylenically unsaturated monomer in an aqueous poly(vinyl alcohol) solution in which at least 30% of the total poly(vinyl alcohol) is 70 to 97 mol % hydrolyzed.