Polyurethane polyols and high solids coatings therefrom
CA 2020987 C · Owner: Uhlianuk, Peter W. · Inventors: Gardon, John L.; Loper, Scott W.; Uhlianuk, Peter W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyurethane Polyols and High Solids Coatings Therefrom A polyurethane polyol is provided, which comprises the reaction product of a particular isocyanate component and a particular diol component in a specified ratio, which polyol component is selected from substantially monomeric, diols wherein the hydroxyl groups are separated by 3 carbon atoms or less. Such polyurethane polyols possess a desirable spectrum of molecular weight properties making, them especially suitable for use in formulating high solids high per-, formance coatings.
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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 July 12, 1990 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 2012.
- 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.