Process for drying water-wet polycarbonate membranes
CA 1322444 C · Owner: Admassu, Wudneh · Inventors: Admassu, Wudneh
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is a process for drying water-wet polycarbonate membranes by contacting the membrane with a pretreatment fluid containing at least one C1-4 alcohol to remove residual solvent and non-solvent and/or tighten the membrane discriminating layer followed by drying the membrane with air or an inert gas to evaporate the alcohol and/or water. 35,596-F
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 September 28, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 28, 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.