Process for the addition of calcium to molten steel
CA 1069314 A · Owner: Sumitomo Metal Industries, Ltd. · Inventors: Mori, Akiyoshi; Tokuda, Makoto; Higashi, Katsuya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title of the Invention, Process for the addition of calcium to molten steel Abstract of the Disclosure, Herein disclosed is a process for the addition of calcium to molten steel at an excellent yield and effect. The process is applied to molten steel having a chemical composition of C 0,02 to 0.55% Si less than 0.50%, Mn 0.20 to 2.50%, usual alloying elements S less, than 0.10%, total oxygen less than 100 ppm and the balance of Fe and maintained at a temperature of 1480 to 1800°C. The process is conducted by shooting cannon balls of Ca-additive to the molten steel or by continuously feeding a wire of Ca-additive to the molten steel in an amount of 0.1 to 2.0 kg on the basis of pure calcium …
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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- 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.