Expired Canadian patentCanada
Tubular envelope composite product containing a compacted matter and serving for the treatment of liquid metals, and production process thereof
CA 1319259 C · Owner: Vallourec · Inventors: Vachiery, Edmond; Douchy, Michel
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 June 22, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 22, 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.
FiledFebruary 23, 1987
GrantedJune 22, 1993
Term endedJune 22, 2010
Patent numberCA 1319259 C
Classification (IPC)C21C7/00 +1 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.