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. 03, 1993
Filed:
Oct. 23, 1992
Peter J Degen, Huntington, NY (US);
Isaac Rothman, Brooklyn, NY (US);
Thomas C Gsell, Glen Cove, NY (US);
Pall Corporation, Glen Cove, NY (US);
Abstract
A process for the preparation of a microporous polymeric membrane is provided which includes polymerizing a polymerizable fluorine-containing monomer in the presence of a microporous polymeric membrane substrate such that the fluorine-containing monomer forms a polymeric superstrate that is permanently chemically bonded to all surfaces of the membrane. A device is also provided for processing fluids which incorporates a microporous polymeric membrane having a CWST of less than about 28 dynes/cm and includes a microporous polymeric membrane substrate formed from a material such as a fluoropolymer and, permanently chemically bonded to all portions of the surface thereof is a superstrate, which may be a polymer or copolymer derived from a monomer(s), having an ethylenically unsaturated group and a perfluoroalkyl group. A gas filtration/drying process, a method of venting a gas from a vessel and a method of separating a gas from a liquid in a gas/liquid mixture using a microporous polymeric membrane having a CWST less than about 28 dynes/cm which includes a microporous polymeric membrane substrate and a superstrate fluoropolymer permanently chemically bonded to all portions of the membrane substrate are also provided.