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Expired Canadian patentCanada

Separating agent composition and method using same

CA 1305832 C · Owner: Price, Leroy R. · Inventors: Price, Leroy R.; Toker, Nazmi Y.

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Abstract From the Canadian patent

By adding an appropriate amount 1 to 12 weight, percent, based on the amount of magnesium oxide present and Loss On Ignition values of powdered magnesium metal to the magnesium oxide aqueous slurry composition used to make a separating-agent composition in the making of grainoriented silicon electrical steel, there are obtained composition, an article, and a method characterized principally by a substantial decrease in the rate of rejections of the product of the final texturizing anneal because of coating defects - such difficulties as bare spots, and metal-overlay pattern. Moreover the magnetic, properties may be improved because of improved control of the propagation of the internally …

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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 August 4, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 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.
FiledSeptember 11, 1987
GrantedAugust 4, 1992
Term endedAugust 4, 2009
Patent numberCA 1305832 C
Classification (IPC)C21D8/12 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedSep 11, 1987Patent grantedAug 4, 1992Term endedAug 4, 2009

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.