Polyurethane elastomer gel insulating composition and use thereof
CA 2427383 C · Owner: Cray Valley Usa, Llc · Inventors: Egret, Helene; Martin, Laurent; Bonnet, Evelyne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns the use of a thermally insulating composition in the form of a crosslinked polyurethane elastomer gel obtained by reacting a polyol, and at least a polyisocyanate in the presence of an inert organic filler for thermal insulation of pipes contained in a duct for transferring products.
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 26, 2001 and granted April 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 26, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 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.