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Expired Canadian patentCanada

Method of forming crystals

CA 1333248 C · Owner: Canon Kabushiki Kaisha · Inventors: Yonehara, Takao

CIPO record

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

A method of forming a crystal comprises a crystal forming treatment effected by dipping a substrate having a nonnucleation surface having a small nucleation density and a nucleation surface having a larger nucleation density than said nonnucleation surface and an area sufficiently fine to such an extent as to allow only a single nucleus to be formed in a solution containing a monocrystal forming material to thereby allow a monocrystal to grow from only the single nucleus.

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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 November 29, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 29, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 25, 1988
GrantedNovember 29, 1994
Term endedNovember 29, 2011
Patent numberCA 1333248 C
Classification (IPC)H01L21/20 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedMarch 25, 1988Patent grantedNov 29, 1994Term endedNov 29, 2011

Sources & verification

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