Process for manufacturing a partially permeable membrane
CA 1315732 C · Owner: Textor, Marcus · Inventors: Textor, Marcus; Franschitz, Wilhelm; Werner, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for manufacturing a partially permeable membrane is such that a 20-200 µm thick aluminum foil in the non-recrystallised condition is etched in an electrolyte at a current density in the range 2-20 kA/m to form a partially permeable aluminum foil membrane having through-flow pores and, the surface is given an after-treatment to prevent hydration reactions; the membrane is particularly suitable for ultrafiltration, gas separation or pervaporation and to that end can also be employed in combination with a polymer membrane.
Read the whole patent
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 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 6, 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.