Flexible water-blown polyurethane foams
CA 2114233 C · Owner: Gabbard, James D. · Inventors: Bhombal, Abdul H.; Gabbard, James D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flexible plasticized polyurethane foam is taught in which water is used as the foaming agent and a plasticizer selected from phthalate, phosphate ester and benzoate plasticizers is added to improve the softness and flexibility of the polyurethane.
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 July 27, 1992 and granted March 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2014.
- 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.