Method of producing steel sections of improved quality
CA 1112549 A · Owner: A R B E D, Acieries Reunies De Burbach-Eich-Dudelange · Inventors: Blondelot, Emile; Economopoulos, Marios; Wilmotte, Stephan H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A steel section 6 to 40 mm thick emerging from a, hot rolling mill at 1000 to 800°C is surface quenched for 2 to 6 seconds at a cooling rate of the order of 1.5 to 5 MW(megawatts)/m2. During subsequent self-tempering of the quenched surface by heat from the remainder, the section tends to an equalization temperature of 500 to 700°C.
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 November 17, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 17, 1998.
- 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.