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Expired Canadian patentCanada

Heat pipe heat sink

CA 2574230 C · Owner: Ueno, Seizo · Inventors: Ueno, Seizo; Eda, Yoshiya; Nagamatsu, Shinya

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

A heat sink (1), wherein heat pipes (3) are disposed in a high temperature section (A) of a base plate (2) on which a heating element (4) is disposed so that , the heat pipes (3) extend from the high temperature section (A) to low temperature sections (B) in different directions.

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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

  • Filed July 15, 2005 and granted February 25, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 15, 2025.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 15, 2005
GrantedFebruary 25, 2014
Term endedJuly 15, 2025
Patent numberCA 2574230 C
Classification (IPC)H01L23/42 +2 more

Timeline

Timeline From CIPO dates

2006200820102012201420162018202020222024Application filedJuly 15, 2005Patent grantedFeb 25, 2014Term endedJuly 15, 2025

Sources & verification

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