Expired Canadian patentCanada
Separation of substances in solution by flow through porous membranes
CA 797604 A · Owner: Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Research Council Of Canada · Inventors: Sourirajan, Srinivasa
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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 October 29, 1968. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 29, 1985.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 25, 1965
GrantedOctober 29, 1968
Term endedOctober 29, 1985
Patent numberCA 797604 A
Classification (IPC)B01D61/24
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.