EP1519782A1

Blister protection for spiral wound elements

Abstract

A method for preventing osmotic blistering in spirally-wound elements of semipermeable membrane sheet material ( 14 ) by applying an effective coating of a sealant ( 41, 43, 45 ) to the upstream surface of such membrane material in regions where such potential for blistering exists and thereby preventing the permeation of liquid into the surface of the semipermeable membrane in these regions.

Term

Term ended

Projected expiry passed 20 June 2023, 3.3 years ago.

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Citations
DocumentRelationOfficeCited during
WO0044481A1CitesWorld Intellectual Property Organization (WIPO)Examiner
EP0253945A1CitesEuropean Patent Office (EPO)Search report