Process for producing a magnetic material and magnetic medium containing the same
CA 1059308 A · Owner: Fuji Photo Film Co. · Inventors: Aonuma, Masashi; Tamai, Yasuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ferromagnetic material having a high coercive force and good squareness ratio prepared by mixing an aqueous solution at least containing a salt of a metal capable of forming a ferromagnetic material with a solution of a reducing agent containing at least one of a boron hydride compound or a derivative thereof to perform an oxidation-reduction reaction wherein the mixing of the solutions is after adjusting the pH of the aqueous solution of the metal salt to about 3.0 or less and the pH of the reaction mixture at the end of the reaction is adjusted to at least about 3.0 or higher.
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 July 31, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 31, 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.