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Expired Canadian patentCanada

Process for making non-oriented high silicon steel sheet

CA 1320107 C · Owner: Nippon Kokan Kabushiki Kaisha · Inventors: Masuda, Sadakazu; Kamata, Masamoto; Ariizumi, Takashi

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Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Non-oriented high Si steel sheet is made without causing antroubles from making a molten steel to rolling to final sheet thickness. An ingot or a continuously cast piece of high Si steel as 4.0 to 7.0 wt% Si is subjected to slabbing - hot rolling otherwise directly slab rolling - hot rolling and subsequently, the hot rolled steel is reduced to thin thickness.

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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 July 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 13, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 6, 1988
GrantedJuly 13, 1993
Term endedJuly 13, 2010
Patent numberCA 1320107 C
Classification (IPC)C21D8/12 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJuly 6, 1988Patent grantedJuly 13, 1993Term endedJuly 13, 2010

Sources & verification

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