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Expired Canadian patentCanada

Exothermic conducting paste

CA 1330870 C · Owner: Awaji Sangyo K.K. · Inventors: Negita, Hisao; Mio, Mitsushi

CIPO record

Overview

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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 an exothermic conducting paste mainly comprising a synthetic resin and a heat stable metal oxide which has a positive temperature coefficient of electric resistance and has an electric specific resistance of not more than 5x103 µ?cm at ordinary temperature; and an electric resistance heating unit wherein a desirably shaped solid or solid surface is coated or impregnated with said paste. This heating unit has an uniform temperature distribution, is arbitrarily adjustable to a desired temperature below 350°C, and further can be formed in various shapes.

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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 July 26, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 26, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 5, 1987
GrantedJuly 26, 1994
Term endedJuly 26, 2011
Patent numberCA 1330870 C
Classification (IPC)H01C7/02 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJune 5, 1987Patent grantedJuly 26, 1994Term endedJuly 26, 2011

Sources & verification

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