Method of applying a polyurethane coating on engineered particleboards
CA 2269401 C · Owner: Cole, Russell L. · Inventors: Kropfeld, Scott A.; Cole, Russell L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of applying a smooth thin waterproof coating on engineered particleboards, including oriented strand boards thereby permitting the use of such boards for applications, wherein the boards are exposed to moisture including, for example, foundation , forms roof, sheathing, basement walls, etc. The method of this invention includes applying a thin liquid, cementitious coating on a surface of an engineered particleboard having a moisture content, preferably less than three percent wherein the cementitious coating fills the interstices between, the particles and coats the surface. The cementitious coating is then dried and the surface is, abraded to receive a thin liquid curable …
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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 April 15, 1999 and granted January 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 15, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2021.
- 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.