Chemical plating method, electrolytic cell and automotive oxygen sensor using it
CA 2307346 A1 · Owner: Donelon, Matthew J. · Inventors: Donelon, Matthew J.; Reidmeyer, Mary R.; Killion, Robert F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An automotive lambda oxygen sensor (1) is formed by electroless plating of a thin, catalytically active, conductive electrode (39) uniformly on the outer surface of a zirconia thimble (31). The process includes forming a pristine zirconia solid electrolyte thimble (31) and drilling out a cylindrical cavity (37) in it. A porous outer surface (55) suitable for producing crystallization sites is formed by dipping the unfired thimble in a zirconia slurry containing spray-dried microspheres and firing the coated thimble to densify the thimble and the microspheres and to produce cavities (57) on the surface of the thimble. An inner platinum electrode (41) is formed by conventional …
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 October 15, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 15, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.