Carbon dioxide blown low density, flexible microcellular elastomers suitable for preparing shoe components
CA 2367077 C · Owner: Younes, Usama E. · Inventors: Younes, Usama E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Microcellular polyurethane flexible foams suitable for use as lightweight shoe sole components are produced by dissolving carbon dioxide into one , or both of the iso-side or resin-side of an isocyanate-prepolymer-based microcellular , polyurethane foam formulation. The resultant foams possess more uniform cell structure and enhanced physical properties as compared to all water-blown foams of , the same basic formulation and density. The hardness of the foams is more suitable , for shoe sole, particularly midsole applications than that of the water-blown , foams, despite the lower urea hard segment content of the CO2 blown foams.
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 January 10, 2002 and granted March 22, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 10, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 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.