Method of producing grain-oriented silicon steel with small boron additions
CA 1307444 C · Owner: Stroble, Carl Philip · Inventors: More, Anthony Philip; Stroble, Carl Philip
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is provided for producing cube-on-edge grain-oriented silicon steel by producing 3 to 10 ppm boron and a manganese-to-sulfur and/or selenium ratio of at least 2.5 in a final gauge steel strip prior to final texture annealing and including a two-stage cold reduction wherein the final cold reduction is less than 75% to provide a steel having improved magnetic properties with a secondary grain size of less than 10 mm and a permeability of 1850 or more at 10 oersteds.
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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 September 15, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 15, 2009.
- 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.