Process for lap-bonding of two metal members having different melting points
CA 2232480 C · Owner: Yahaba, Takanori · Inventors: Yahaba, Takanori; Okabe, Shinji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an area where an Al alloy plate and a steel plate lap each other a , circular blank of steel plate is made to lap the Al alloy plate and these , three members are compressed by a pair of electrodes while a welding current is passed between the both electrodes. Thus melting of a current passing portion of the Al alloy plate and a neighborhood thereof removal of the , melted portion due to partial expanding deformation of the blank toward the Al alloy plate, abutting of the expanding deformed portion against the steel plate and resistance welding of the expanding deformed portion with the steel plate are successively carried out.
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 September 18, 1996 and granted July 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 18, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 18, 2018.
- 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.