Energy absorbing panel
CA 2115482 C · Owner: Woodbridge Foam Corporation · Inventors: Kerman, Michael L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An energy absorbing panel comprising a resilient polyurethane foam core having a density in the range of from about 1.5 to about 24 pounds per cubic foot and an indentation force deflection at 25% when measured, pursuant to ASTM 3574-B1 less than about 4000 pounds and at least one energy absorbing surface comprised of a flexible reinforcing layer covering the resilient polyurethane foam core. The panel is useful in a variety of applications where energy management is required. Upon impact the panel, is capable of absorbing at about 70% of the input energy. Further upon, compressor of the panel at the energy absorbing surface to about 50% by volume of the uncompressed panel in a direction …
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 February 11, 1994 and granted May 23, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2016.
- 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.