Expired Canadian patentCanada
Process for nitriding ferrous metal pieces to enhance their resistance to corrosion
CA 2129061 C · Owner: Centre Stephanois De Recherches Mecaniques Hydromecanique Et Frottement S.A. · Inventors: Terrat, Jean-Paul; Hadj-Rabah, Hocine
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
- Filed July 28, 1994 and granted December 12, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 28, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 28, 1994
GrantedDecember 12, 2000
Term endedJuly 28, 2014
Patent numberCA 2129061 C
Classification (IPC)C23C8/50 +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.