Polyurethane coating composition derived from long-chain aliphatic polyol
CA 2106701 C · Owner: Steinmetz, Alan L. · Inventors: Steinmetz, Alan L.; Serdiuk, Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coating composition is disclosed comprising: (a) an aqueous medium, (b) a water-dispersible polyurethane resin that is the reaction product of a mixture comprising:, (1) a long-chain aliphatic polyol having greater than 18 to 60 carbon atoms, (2) a multifunctional compound having at least one active hydrogen group and at least one raster-stabilizing group, (3) an active hydrogen-containing capping and/or chain extending agent, and, (4) a polyisocyanate and, (c) an aminoplast crosslinking agent.
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 September 22, 1993 and granted October 24, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2015.
- 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.