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:
Apr. 07, 1992
Filed:
Jun. 21, 1991
Warren A Waite, Burlington, MA (US);
Hans I Viklund, Marlboro, MA (US);
Ionics, Incorporated, Watertown, MA (US);
Abstract
Semi-permeable membrane and membrane/support assemblies and systems for microfiltration, ultrafiltration, nanofiltration, reverse osmosis, electrodialysis, electrodeionization and piezodialysis filter systems are formed of polymer membranes (14), including fine particle moieties (24) or threads (16) of substantially water insoluble, oligodynamic bioactive (biostatic and/or biocidal) dispersed material. When these membranes systems are used in aqueous liquids the dispersed material dissolves slowly and provides a continuous biostatic and/or biocidal action over a long duration to counteract membrane fouling propensities of the system environment.