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Expired Canadian patentCanada

Blocked isocyanate composition for forming thermoparticulating coating

CA 1073788 A · Owner: Westinghouse Electric Corporation · Inventors: Meier, Joseph F.; Phillips, David C.; Smith, James D. 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

A composition is disclosed of a blocked isocyanate a resinous carrier, and a solvent. The composition is applied to a portion of an electrical apparatus which is exposed to a gas stream. The solvent in the composition is evaporated to produce a thermoparticulating coating. When the electrical apparatus overheats the blocked isocyanate in the coating forms particles in the gas stream which are detected by a monitor. -1-

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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 March 18, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 18, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedMarch 18, 1980
Term endedMarch 18, 1997
Patent numberCA 1073788 A
Classification (IPC)G01K11/02 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedMarch 18, 1980Term endedMarch 18, 1997

Sources & verification

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