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Expired Canadian patentCanada

Method of manufacturing a thermoelectric element

CA 1248243 A · Owner: Energy Conversion Devices, Inc. · Inventors: Allred, David; Reyes, Jaime; Nguyen, On V.

CIPO record

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

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Abstract From the Canadian patent

Disclosed are a thermoelectric device and method of making the device. The device has a plurality of thermoelectric elements electrically in series and thermally in parallel, where the individual thermoelectric elements have a thermoelectric body formed of macroscopically disordered material with electrical contact surfaces at opposite ends and a multi-layered diffusion barrier coating on the electrical contact surfaces.

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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 January 3, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 3, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 4, 1986
GrantedJanuary 3, 1989
Term endedJanuary 3, 2006
Patent numberCA 1248243 A
Classification (IPC)H01L37/00 +2 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedFeb 4, 1986Patent grantedJan 3, 1989Term endedJan 3, 2006

Sources & verification

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