Expired Canadian patentCanada
Filter medium for cake-forming filtration processes
CA 1338504 C · Owner: Zuricher Beuteltuchfabrik Aktiengesellschaft · Inventors: Muller, Hans-Rudolf
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filter medium for cake-forming filtration processes is described which, is characterized in that a filter membrane is embedded on either side in a fabric structure, which assumes a mechanical protective function.
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 August 6, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 6, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 2, 1989
GrantedAugust 6, 1996
Term endedAugust 6, 2013
Patent numberCA 1338504 C
Classification (IPC)B01D69/10 +2 more
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.