High performance induction plasma torch with a water-cooled ceramic confinement tube
CA 2085133 C · Owner: Universite De Sherbrooke · Inventors: Jurewicz, Jerzy; Boulos, Maher I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high performance induction plasma torch (1) comprises a cylindrical torch body (2) made of cast ceramic or composite polymer, a coaxial cylindrical plasma confinement tube (9) located inside the torch body (2) a gas distributor, head (11) secured to one end of the torch body (2) to supply the confinement tube (9) with gaseous substances a cylindri-, cal and coaxial induction coil (3) completely embedded in the ceramic or polymer material of the torch body (2) and a thin, annular chamber (25) separating the coaxial torch body (2) and confinement tube (9). This confinement tube can be made of pure or composite ceramic materials based on sintered or reaction bonded silicon nitride boron …
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 April 10, 1992 and granted January 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2014.
- 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.