Fine-celled plastic foam containing fluorochemical blowing agent
CA 2116857 A1 · Owner: Dams, Rudolf J. · Inventors: Owens, John G.; Flynn, Richard M.; Dams, Rudolf J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A blowing agent emulsion comprising a blowing agent mixture such, that the mixture comprises (1) one or more low boiling hydrochlorocarbons, (2) one or more low boiling chlorine-free perfluorinated compound, and (3) optionally one or more low boiling, hydrochlorofluorocarbons one or more low boiling, hydrofluorocarbons one or more low boiling hydrocarbons, or mixtures thereof; a foamable polymerizable reaction mixture and a fluorochemical, surfactant, optionally a silicone surfactant, and a catalyst; a foamed plastic; and a process for making thereof.
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 August 26, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 26, 2014.
- 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.