Polyurethane foam product manufactured with vegetable oil polyol and method for manufacturing
CA 2545892 C · Owner: Griggs, William · Inventors: Gilder, Stephen D.; Griggs, William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bonded foam product manufactured with a vegetable oil polyol is herein disclosed. The pre-polymer for use as a binder in the manufacture of a bonded foam product comprises an isocyanate and a vegetable oil polyol wherein the pre-polymer is substantially free of any petrochemical polyol. In another aspect the invention is method for making a bonded foam product the method comprising coating a plurality of foam pieces with a pre-polymer the pre-polymer comprising an isocyanate and a vegetable oil polyol wherein the pre-polymer is substantially free of any petrochemical polyol compressing the foam pieces into a foam log of a desired density and steaming the foam log to cure the pre-polymer. …
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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 5, 2006 and granted September 9, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 5, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.