Reduction of discoloration in flame retarded polyurethane foams
CA 1318080 C · Owner: Supresta Llc · Inventors: Fesman, Gerald; Williams, Barbara Ann; Jacobs, Barry Alan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyurethane foams containing halogenated phosphorusbased flame retardants are protected from scorching by the incorporation therein of an anti-scorch package which comprises a diaryl arylenediamine, the reaction product of a diarylamine and a lower alkyl ketone, and a hindered phenol. * * * * *
Read the whole patent
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 18, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 18, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.