Adhesive system containing tannin for binding lignocellulosic materials
CA 2392876 C · Owner: Gres, Edward M. · Inventors: Gres, Edward M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An adhesive system for use in binding lignocellulosic materials into a composite product the adhesive system consisting essentially of (1) an effective amount of at least one powdered tannin; and (2) an effective amount of at least one additional adhesive component chosen from powdered aldehyde polymers liquid solutions of aldehyde polymers, and liquid solutions of polymeric isocyanate. The invention also provides a method of making a composite product using the present adhesive system and a composite product made using the present adhesive system.
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 11, 2002 and granted November 22, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 2024.
- 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.