Polyurethanes containing dispersed crystalline polyesters
CA 2409088 A1 · Owner: Van Der Wal, Hanno R. · Inventors: Van Der Wal, Hanno R.; Lysenko, Zenon; Sonnenschein, Mark F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is disclosed for producing resilient polyurethane foams by foaming an organic polyisocyanate, an isocyanate-reactive compound and a fusible polymer. The improvement in the hardness of the foams is achieved without adversely affecting the other properties of the foams such as tensile , strength and elongation.
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 May 15, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 15, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 2023.
- 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.