Process for high permeability silicon steel
CA 1045955 A · Owner: Allegheny Ludlum Corporation · Inventors: Salsgiver, James A.; Malagari, Frank A. (Jr.)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing silicon steel having a cube-on-edge orientation and permeability of at least 1850 (G/Oe) at 10 oersteds which, includes the steps of: preparing a melt of steel consisting essentially of by, weight, up to 0.07% carbon, from 2.60 to 4. 0% silicon from 0.03 to 0.24%, manganese, at least 0.01% selenium from 0.01 to 0.09% of material from the group consisting of sulfur and selenium from 0.015 to 0.04% aluminum up to, 0.02% nitrogen from 0.1 to 0.5% copper, balance iron; casting the steel; hot rolling the steel; annealing the steel prior to a final cold roll at a temperature of from 1400 to 2150°F; cooling the steel from a temperature below 1700°F and above 750°F to a …
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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 January 9, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 9, 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.