Method for modifying asymmetric membranes by endo-treating
CA 1320318 C · Owner: Albany International Corp. · Inventors: Coplan, Myron J.; Burchesky, R. Douglas; Giglia, Salvatore
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of treating a dry asymmetric membrane comprising a barrier layer surface and, an obverse surface wherein the barrier layer surface is maintained in a drying atmosphere while a wetting liquid which is not a solvent for the bulk of the membrane is applied to the obverse surface of the membrane, and the membrane is dried by continuing the exposure of the barrier layer to a drying atmosphere.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 20, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.