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Expired Canadian patentCanada

Heat sink for electronic components

CA 1211861 A · Owner: Philips Electronics N.V. · Inventors: Glaser, Chris

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

PH. 25.110, ABSTRACT:, A heat sink assembly especially adapted for use with semiconductors having flat packages such as of the TO-220 type wherein a heat sink mounting surface is bounded by two upstanding walls having outer edge flanges inturned over the mounting surface to cooperate with a spring clip to press a mounted component against the heat sink surface. Mounting bolts and/or holes in the mounting surface are dispensed with and the assembly is low cost and simple to use.

Read the whole patent

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 23, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 23, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 19, 1983
GrantedSeptember 23, 1986
Term endedSeptember 23, 2003
Patent numberCA 1211861 A
Classification (IPC)H01L23/34

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedOct 19, 1983Patent grantedSep 23, 1986Term endedSep 23, 2003

Sources & verification

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