Expired Canadian patentCanada
Plastic tube extrusion
CA 774475 A · Owner: Du Pont Of Canada Limited · Inventors: Thomas, Carmen V.
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 December 26, 1967. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 26, 1984.
- 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 26, 1963
GrantedDecember 26, 1967
Term endedDecember 26, 1984
Patent numberCA 774475 A
Classification (IPC)B29C48/88
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.