Extruded styrene resin foams and methods for producing the same
CA 2356917 A1 · Owner: Oohara, Youichi · Inventors: Yoshida, Toru; Hirose, Fuminobu; Fujiwara, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An extruded foam obtained by subjecting a styrene resin to extrusion foaming and excellent in suitability for the environment and in flame retardancy and heat-insulating properties. It is characterized by having been obtained with one or more foaming agents comprising 100 to 10 wt.% at least one C3-5 saturated hydrocarbon and 0 to 90 wt.% other foaming agent based on all the foaming agents and by containing (A) a halogenated flame retardant and (B) at least one compound selected from the group consisting of phosphorus compound flame retardants having a nitrogen atom in the molecule tetrazole compounds, cyanuric acid and derivatives thereof isocyanuric acid and derivatives , thereof …
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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
- Filed October 26, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2022.
- 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.