Shock absorbing material
CA 2446649 A1 · Owner: Bridgestone Corporation · Inventors: Horimatsu, Toshiyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A shock absorbing material having a remarkably excellent shock absorbing performance, capable of absorbing impact energy added to the head part of an occupant inside a cabin at the time of collision of a car and suitably used , as a head part protective material to reduce a head part injury value comprising a body part (11) formed of hard polyurethane foam and a surface material (12) higher in rigidity than the body part (11) installed on the impact support surface of the body part (11) wherein the surface material , (12) is formed of synthetic resin metal, alloy, glass, or ceramics of 0.5 to 5 mm in thickness, and the hard polyurethane foam is 10 to 80 mm in thickness 0.25 to 2 MPa in …
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 October 28, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 28, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2024.
- 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.