Process for utilizing ferrophosphorus
CA 1069671 A · Owner: Hoechst Aktiengesellschaft · Inventors: Stenzel, Jurgen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Ferrophosphorus is a by-product of electrothermal production of elementary phosphorus and has been of limited use. This invention provides a use for ferrophosphorus, in which a melt of ferrophosphorus is reacted with a molt of calcium silicide so as to obtain ferrosilicon and calcium phosphide.
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 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 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.
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.