Air hardenable, formable steel
CA 1051694 A · Owner: Inco Limited · Inventors: Donachie, Stephen J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing a highly formable steel capable of affording yield strengths upwards of 90,000 psi through air hardening and without need of liquid quenching. The steel preferably contains correlated percentages of chromium and nickel among other elements and should be in the martensitic condition prior to the first heat treating step. It is deemed that the steels are useful for manufacture of automotive bumpers.
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
- Granted April 3, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 1996.
- 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.