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Expired Canadian patentCanada

Fire barrier i. coatings

CA 1236656 A · Owner: Delphic Research Laboratories, Inc. · Inventors: Ellis, Harold (Hal)

CIPO record

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Abstract From the Canadian patent

A novel non-combustible thin coating, applied, as an air-setting paint is used to form a coherent, fire-barrier on or between susceptible wood or plastic substrates, or other substances. Consisting of a paint-like slurry of three separate but compatible and mutually synergistic co-bonding systems viz. magnesium "oxychloride" cement, plus high alumina mono-calcium aluminate cement, plus colloidal silica dispersed in dimethyl formamide (DMF), and utilizing an aqueous solution of magnesium chloride as the common hydrating fluid for the two cements the coating, retains its structural integrity through prolonged exposure to flame temperatures of 2000°F. The coating takes advantage of its …

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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 May 17, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 17, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 23, 1985
GrantedMay 17, 1988
Term endedMay 17, 2005
Patent numberCA 1236656 A
Classification (IPC)B32B13/04 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedApril 23, 1985Patent grantedMay 17, 1988Term endedMay 17, 2005

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