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:
Jun. 02, 1992
Filed:
Nov. 30, 1990
Applicant:
Inventor:
Wayne A McRae, Zurich, CH;
Assignee:
Ionics Incorporated, Watertown, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
210653 ; 210654 ; 210490 ; 21050027 ; 210 5028 ; 21050037 ; 21050038 ; 21050042 ; 21050043 ; 264 451 ;
Abstract
Novel thin film composite membranes are disclosed. They are prepared from vinyl and related monomers by phase transfer catalysis at the interface between one phase containing a polymerizable vinyl or related monomer and a second phase containing an entity necessary to initiate polymerization of the monomer. The two phases are substantially insoluble in each other. At least one of the phases is a fluid. One of the phases is integral with a porous support or substrate or a precursor of such support or substrate such as a porous organic or inorganic diaphragm made by thermal phase inversion from which the soluble phase has not been extracted.