Method of controlling a plasma arc cutting torch
CA 2234741 C · Owner: Warren, Joseph Valerious Jr. · Inventors: Oakley, Thomas Franklin; Warren, Joseph Valerious Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of controlling a plasma are torch in cutting or marking a workpiece along a path of travel having a starting point and stopping point in accordance with a predetermined program and in which an arc extinguish order in issued at a predetermined point or location on the path of travel spaced upstream of the stopping point a distance determined by the speed or velocity of the torch and the arc extinguish delay time between issuance of the arc extinguish order and actual extinguishment of the arc so that the arc is extinguished at the precise instant the torch arrives at the stopping point.
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 14, 1998 and granted December 18, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 14, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 14, 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.