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Expired Canadian patentCanada

Ingaas field effect transistor

CA 1196111 A · Owner: Western Electric Company, Incorporated · Inventors: O'Connor, Paul; Cho, Alfred Y.; Pearsall, Thomas P.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

12 -, InGaAs FIELD EFFECT TRANSISTOR Abstract, InGaAs FETs using a silicon nitride layer between the metal and the channel layer reduce the gate leakage current and yield desirable FET characteristics particularly high transconductance.

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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 October 29, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 29, 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.
FiledFebruary 15, 1983
GrantedOctober 29, 1985
Term endedOctober 29, 2002
Patent numberCA 1196111 A
Classification (IPC)H01L29/78 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedFeb 15, 1983Patent grantedOct 29, 1985Term endedOct 29, 2002

Sources & verification

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