Butt welding of at least two metal sheets
CA 2101515 C · Owner: Sollac · Inventors: Philbois, Nathalie; Guth, Jerome
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for butt welding at least two plates (1 2) of different thicknesses using a laser beam (3). The process consists in bringing the plates (1 2) into contact at their lateral surfaces (4 5) to be joined, aiming the laser beam (3) at the thicker plate (1) so that the vertical axis X-X through the focal point P of the laser beam (3) on the said plate (1) is at a set distance from the plane of the joint (7) between the two plates and in making the weld on the lateral surfaces (4 5) joined by local fusion of the said plates by the laser beam (3).
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 July 28, 1993 and granted April 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 28, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 28, 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.