Expired Canadian patentCanada
Electrode for electric discharge surface treatment, method of electric discharge surface treatment, and apparatus for electric discharge surface treatment
CA 2494366 C · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Ochiai, Hiroyuki; Watanabe, Mitsutoshi; Goto, Akihiro
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To form a thick coat by an in-liquid pulsed electric discharge treatment, the electrode contains 40 volume % or more metallic material that is not carbonized or is hard to be carbonized.
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
- Filed July 30, 2003 and granted October 9, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 30, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2025.
- 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 30, 2003
GrantedOctober 9, 2012
Term endedJuly 30, 2023
Patent numberCA 2494366 C
Classification (IPC)C23C26/00
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.