Rotatable plasma torch
CA 2008174 C · Owner: Lockheed Martin Advanced Environmental Systems, Inc. · Inventors: Schlienger, Max P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved plasma torch having a rugged configuration, which is easier to start and which, eliminates the need for fragile and possibly metal contaminating insulators from the lower end of the plasma torch. To prevent double arcing from occurring and to enable the elimination of costly insulators from the nozzle area, the electrode and nozzle of the plasma torch of a first embodiment of the present invention are rotated as a unit at a speed in the range of 0 to 400 rpm. In a second embodiment of the invention the, nozzle assembly rotates relative to the electrode which is normally stationary. The electrode and nozzle could rotate in opposite directions as well. When the nozzle assembly is …
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 January 19, 1990 and granted May 31, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 2012.
- 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.