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Expired Canadian patentCanada

Fire-resistant composition

CA 1283234 C · Owner: Monsanto Company · Inventors: Gomez, Ildefonso L.

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 fire-resistant thermoplastic composition comprising polyvinyl butyral resin and a compatible mixture in an amount sufficient to provide fireresistant properties to such composition which includes a) a plasticizer blend of a char-forming component such as an organic phosphate, and an oxygen sequestering agent, such as an organic phosphite wherein the, char-forming component is the major constituent; b) a nucleating agent such as fumed silica for dispersing the fire decomposition products of the composition; and c) a heat reactive bonding resin.

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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 April 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 22, 1986
GrantedApril 16, 1991
Term endedApril 16, 2008
Patent numberCA 1283234 C
Classification (IPC)C08L29/14 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedDec 22, 1986Patent grantedApril 16, 1991Term endedApril 16, 2008

Sources & verification

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