Composition and process for coating metallic surfaces
CA 2004715 C · Owner: Novamax Technologies Corporation · Inventors: Biggin, John G.; Sliwinski, Peter R.; Mitchell, Peter J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A no-rinse aqueous chemical composition for treating a metallic surface prior to application of an organic siccative coating characterised in that it comprises from 1.5 to 40 g/l (total) of Cr (VI) and optionally one or more of Ni Co, Mg, Fe and Zn, and, from 0.3 to 6.0 g/l (total) of F- and optionally PO4 3- is disclosed. A process for treating a metallic surface prior to application of an organic siccative coating characterised in that it comprises applying to the surface such a composition and not rinsing is also disclosed.
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 6, 1989 and granted November 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 6, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 2011.
- 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.