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Expired Canadian patentCanada

Flame retardant melamine cured polyurethane foam with improved properties

CA 1303791 C · Owner: Reeves Brothers, Inc. · Inventors: Murph, Ronald Lance; Howard, Gregory Wayne; Ricciardi, Michael Anthony

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Abstract From the Canadian patent

Flexible polyurethane foam forming compositions comprising a polyether polyol, an organic isocyanate compound, a blowing agent, and a curing agent preferably, melamine, in an amount effective to rapidly cure the resultant foam and improve the compression set properties of the foam, the amount of curing agent generally ranging from about 0.25 up to about 4 parts by weight based on 100 parts polyether polyol. Also, flame retardant polyether polyurethane foam prepared from foam forming components of a polyether polyol, an organic isocyanate compound water, a, liquid phosphorus ester in an amount of about 4 to 10 parts by weight and melamine in an amount of 1 to 5 parts by weight each based on …

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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 June 16, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 19, 1988
GrantedJune 16, 1992
Term endedJune 16, 2009
Patent numberCA 1303791 C
Classification (IPC)C08L75/08 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMay 19, 1988Patent grantedJune 16, 1992Term endedJune 16, 2009

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