Water blown polyurethane spray foam system
CA 2573709 C · Owner: Polythane Systems, Inc. · Inventors: Harkins, Philip D.; Anderson, Ray J.; Sparks, Thomas A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition and a method for producing primarily water blown polyurethane foams is provided. The composition uses isocyanate ratios greater than conventional foam system to provide a water blown polyurethane foam suitable for a wide variety of applications including spray roofing insulation, etc. , The preferred composition for preparing a polyurethane foam comprises an isocyanate component and a polyol component wherein the polyol component , preferably comprises a combination of Mannich polyol polyester polyol, and , polyether polyol. Preferably the composition includes water to act as a blowing agent and a metal salt catalyst to assist in the reaction. Preferably the isocyanate …
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 12, 2005 and granted April 9, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 12, 2025.
- 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.