Flame retardant low density extruded foam articles
CA 2023402 C · Owner: Lassor, Richard D. · Inventors: Lassor, Richard D.; Bopp, Richard C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Flame resistant low density foam articles are provided. The foam article is preferably a foam board or a molded expandable foam bead comprised of a thermoplastic resin having adhered thereto a flame-resistanceconferring material serving as a surface flame-resistant barrier in the nature of a thermoplastic or thermosetting coating or laminate or in the nature of a foil, such as aluminum foil.
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 16, 1990 and granted December 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 2012.
- 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.