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Expired Canadian patentCanada

Doped semiconductor nanocrystals and methods of making same

CA 2609650 C · Owner: Peng, Xiaogang · Inventors: Pradhan, Narayan; Peng, Xiaogang

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Abstract From the Canadian patent

Compositions/doped nanocrystals and methods of making the same. The doped nanocrystals , comprise a core comprising at least one dopant and a shell substantially surrounding the core, wherein the doped nanocrystals as produced according to the method show a characteristic of , semiconductor and are free of surface doping which can be used as an , electronic device a , light-emitting-diodes and the like.

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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

  • Filed April 25, 2006 and granted November 4, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 25, 2026.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 25, 2006
GrantedNovember 4, 2014
Term endedApril 25, 2026
Patent numberCA 2609650 C
Classification (IPC)C30B31/04 +2 more

Timeline

Timeline From CIPO dates

2007200920112013201520172019202120232025Application filedApril 25, 2006Patent grantedNov 4, 2014Term endedApril 25, 2026

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