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Expired Canadian patentCanada

Low resistance resistor compositions

CA 1262589 C · Owner: Shahbazi, Samson · Inventors: Martin, Frank W.; Shahbazi, Samson

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Abstract From the Canadian patent

i -, PATENT APPLICATION, of, F. Wayne Martin and, Samson Shahbazi, for, LOW RESISTANCE RESISTOR COMPOSITIONS DN 84-31 WERS/day, ABSTRACT OF THE DISCLOSURE This invention provides unique resistor compositions. These compositions contain solid long chain phenolic resin, liquid short chain phenolic resin and a mixture of carbon black and graphite particles dispersed therein. The combination of these elements allows for resistor compositions that are capable of withstanding high humidity conditions without significant changes in resistivity and which are capable of low ohmic values in the absence of metals. Also provided is a method of producing these compositions.

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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 31, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 31, 2006.
  • 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 19, 1985
GrantedOctober 31, 1989
Term endedOctober 31, 2006
Patent numberCA 1262589 C
Classification (IPC)H01C7/00 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedJune 19, 1985Patent grantedOct 31, 1989Term endedOct 31, 2006

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