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:
Nov. 12, 2019
Filed:
Feb. 19, 2015
Sartorius Stedim Biotech Gmbh, Goettingen, DE;
Abstract
A method for producing a microporous membrane includes providing a microporous starting membrane having outer surfaces and pores with inner surfaces extending between the outer surfaces of the membrane and having a microporous starting membrane permeability. The method impregnates the membrane with an impregnating solution consisting essentially of a solvent and a polymer. The polymer is an organic substance with an average molecular weight of at least 500 g/mol and may be selected from the group consisting of poly(2-ethyloxazoline), polyvinylpyrrolidone-vinyl acetate (PVP-VA) and mixtures thereof. The method then includes irradiating the impregnated membrane with electron beam radiation to provide a crosslinked reaction product constituting a three-dimensional network formed of the microporous starting membrane and the polymer without any decomposition of the microporous starting membrane. The microporous starting membrane permeability is not reduced by more than 10% by fixing the electron beam radiation crosslinked polymer thereto.