Method of testing welding filler materials
CA 2109367 C · Owner: Gunnell, Lyle P. · Inventors: Gunnell, Lyle P.; Van Le, Duong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of testing a filler material to be used in an arc welding process, the method comprising the steps of providing first and second test plates the first test plate, having a generally planar surface and the second test plate, having opposed parallel, generally planar surfaces and a beveled edge forming a generally planar beveled surface extending at an angle from one of the opposed surfaces and forming a generally planar land which extends between the beveled surface and the other of the opposed surfaces and which extends generally perpendicular to the opposed surfaces, placing the land in abutment with the first plate surface, providing a restraining fillet weld at the junction of …
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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 October 27, 1993 and granted February 24, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 27, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 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.