High-temperature rigid polyurethane spray foam for pipe insulation
CA 2583487 C · Owner: Bayer Materialscience Llc · Inventors: Dobransky, Michael A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a rigid polyurethane spray foam which is made , using cyclopentane as the blowing agent and which is useful for pipe insulation because of its ability to withstand high~temperatures (>250~F). The inventive foams may be sprayed with existing foam spraying equipment because the foams are reacted at about a 1:1.25 polyol to isocyanate ratio.
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 October 12, 2005 and granted July 23, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 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.