Welding apparatus and method
CA 2390386 A1 · Owner: Erico International Corporation · Inventors: Quoy, Didier J. M.; Hermans, Jacobus P. M.; Van Den Broek, Johannes L. L. A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An exothermic welding system uses compressible layers of disposable refractory batting or gaskets to form a weld chamber for parts to be welded. The parts to be welded are layered with the batting between a base and a crucible platen supported by a clamping fixture. The layered batting is provided, with the holes intersecting the parts to be welded. The holes form the weld chamber. The crucible platen is provided with a chamber for the exothermic material which when ignited forms molten metal which flows through a tap hole into the weld chamber. When the weld is made the fixture is opened and the, batting is discarded. The invention is also the method of forming the welded connection by …
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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 July 3, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 3, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 3, 2024.
- 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.