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Expired Canadian patentCanada

Method for increasing the band gap in photoresponsive amorphous alloys and devices

CA 1192817 A · Owner: Energy Conversion Devices, Inc. · Inventors: Ovshinsky, Stanford R.

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Abstract From the Canadian patent

The production of improved photoresponsive amorphous alloys (118, 146, 148, 150, 168 170, 172, 174, 176, 180, 194, 206, 208 210, 214, 216, 218, 220) and devices (142 168, 178, 192, 198, 212), such as photovoltaic photoreceptive devices, and the like; having improved wavelength threshold characteristics is made possible by adding one or more band yap increasing elements to the alloys (118, 146, 148, 150, 168, 170, 172, 174 176, 180, 194, 206, 208, 210, 214, 216 218, 220) and de-, vices (142, 168, 178 192, 198, 212). The in-, creasing element or elements are added at least to a portion of the active photoresponsive regions (150, 170, 172, 180, 186, 194, 208, 216) of amorphous devices (142, …

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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 September 3, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 3, 2002.
  • 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 8, 1981
GrantedSeptember 3, 1985
Term endedSeptember 3, 2002
Patent numberCA 1192817 A
Classification (IPC)H01L45/00 +2 more

Timeline

Timeline From CIPO dates

1982198519881991199419972000Application filedSep 8, 1981Patent grantedSep 3, 1985Term endedSep 3, 2002

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