Asymmetric membranes and process therefor
CA 1202837 A · Owner: Brunswick Corporation · Inventors: Wrasidlo, Wolfgang J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
IMPROVED ASYMMETRIC, MEMBRANES AND PROCESS THEREFOR ABSTRACT OF THE DISCLOSURE:, There is disclosed in one aspect, an improved highly, asymmetric membrane comprising a skin and a porous asymmetric support. The skin contains pores which have an average pore diameter from about 0.005 to about 3.0 microns and this asymmetric support comprises a reticulated structure which contains pores which have pore diameters of from about 10 to about 20,000 times as large as the average pore diameter of the pores of the skin. The membrane has a bulk porosity greater than about 70%. In another aspect, there is disclosed a process for preparing these membranes. This process comprises casting a polymer dope …
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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 April 8, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 8, 2003.
- 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.