Apparatus for air arc gouging
CA 2019232 C · Owner: Gilliland, Malcolm T. · Inventors: Gilliland, Malcolm T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract An air arc gouger. A central power supply (10) and a welding station (11) are used for welding operations such as, welding two metal plates (30A 30B) together. If a weld (30C) is, required to be removed an adapter circuit (12), in conjunction with the central power supply (10) and the welding station (11) are, used. The adapter circuit (12) need only supply the difference between the current required to maintain the gouging arc (31) and the maximum continuous output current of the welding station (11). The adapter circuit (12) is smaller less expensive, lighter, more portable and generates less heat than a conventional resistor grid.
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 June 18, 1990 and granted June 14, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 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.