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:
Aug. 01, 1989
Filed:
Apr. 19, 1988
Wolfgang J Wrasidlo, LaJolla, CA (US);
Frieder K Hofmann, Oceanside, CA (US);
Dirk M DeWinter, Vista, CA (US);
Brunswick Corporation, Skokie, IL (US);
Abstract
In applications involving interleaving membranes with separators, for bioreactors, dialyzers, and membrane filters and the like, shrinkage of the separator, preferably made of polypropylene, polyamides, or polyethylene terephthlate fiber web, is avoided, and the need for the use of exotic and expensive fluorinated hydrocarbon polymer materials for such separators is avoided by subjecting the separator to untensioned heating at temperatures of from about b 120 l degrees C., up to a temperature less than the glass transition or melting temperature of the polymer web under wet steam at a pressure of from about 1.0 to about 2.0 atmospheres for a time of at least about 20 minutes.