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:
Jan. 05, 1993
Filed:
Apr. 20, 1992
Applicant:
Inventors:
Walter L Vaughn, Lake Jackson, TX (US);
Thomas J McKeand, Jr, Clute, TX (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210638 ; 2105021 ; 21050036 ;
Abstract
Novel filters are prepared, and filtrations are performed, using porous fibers and filaments which are comprised of normally solid, thermoplastic, orientable, organic polymers which have reactive or reactable groups pendent from the polymer chain, said polymers being made using a process which involves reactions of said pendent groups while the polymer is in an oriented condition. One of the preferred polymers is a copolymer of ethylene/acrylic acid. Ionomers of the polymers can be used.