Fire resistant alkenylaromatic foams
CA 2083137 C · Owner: Suh, Kyung W. · Inventors: Stobby, William G.; Suh, Kyung W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Flame retardant alkenylaromatic thermoplastic resin compositions are provided comprising 100 parts alkenylaromatic polymer, 0.2 to 5 parts of at least one brominated aliphatic compound, 0.5 to 3 parts of at least one other and different brominated organic compound having a higher volatilization temperature and greater heat stability than said brominated aliphatic compound and from 0.05 to 5 parts of at least one melt flow promoter.
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
- Filed May 1, 1991 and granted December 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 1, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 1, 2013.
- 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.