Tannin staining and fungus growth inhibitor pigment
CA 2207994 C · Owner: Sinko, John · Inventors: Sinko, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process of inhibiting of the staining of a film forming finish applied to a tannin containing wood substrate includes the step of applying to the wood substrate prior to or concurrently with the film forming finish a protective , coating containing an effective amount of zinc cyanamide to inhibit the migration of tannins from the substrate into the finish.
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 December 18, 1995 and granted September 18, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 18, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2017.
- 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.