Plasma spray apparatus for spraying powdery material
CA 2102284 C · Owner: Plasma-Technik Ag · Inventors: Landes, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The plasma spray apparatus for spraying powdery material particularly for the coating of the surface of a work piece comprises an indirect plasmatron adapted to create an elongated plasma torch, having a central longitudinal axis and means for feeding the powdery material into the plasma torch. The plasmatron comprises a cathode assembly having at least three cathode members evenly distributed along a circle around the central longitudinal axis of the plasmatron an annular, anode member located distantly from the cathode member and a plasma channel extending from the cathode assembly to the anode member. The plasma channel is delimited by the annular anode member as well as by a plurality …
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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 November 2, 1993 and granted March 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 2, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 2015.
- 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.