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Expired Canadian patentCanada

Integrated circuits

CA 1112306 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Gee, Lawrence F.; Aldhous, Christopher J.; Jarvis, Denis B.

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

An integrated circuit for the generation of logic combinations of applied logic input signal comprising a semiconductor body with an array of insulated gate field effect transistors formed in a part, mainly of one conductivity type of the semiconductor body. These transistors have gate electrodes self-registered with source and drain electrode regions and are formed at crossings of a plurality of parallel first conductive tracks, which comprise the transistor gate electrodes and a plurality of parallel strip-shaped surface regions of opposite conductivity which adjoin a surface of the body. The surface regions comprising the source and drain electrode regions. A first group of transistors …

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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 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 12, 1978
GrantedNovember 10, 1981
Term endedNovember 10, 1998
Patent numberCA 1112306 A
Classification (IPC)H01L27/10 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedJan 12, 1978Patent grantedNov 10, 1981Term endedNov 10, 1998

Sources & verification

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