Improved protective coatings for metals and other surfaces
CA 2322767 A1 · Owner: Tomlinson, Charles E. · Inventors: Tomlinson, Charles E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compositions and processes are disclosed for producing improved environmental protection, corrosion resistance and improved paint adhesion for metals e.g. ferrous, aluminum, or magnesium alloys as well as other substrates upon , contact. The compositions and processes comprise use of one or more Group IV-A metals, such as zirconium, in combination with one or more Group III-A metals such as cerium, in an acidic solution with one or more oxyanions or other nonfluoanions to stabilize and solubilize the metals while fluorides are specifically excluded from the processes and compositions above certain levels. The processes can contain pretreatment stages that serve to activate a substrate …
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 March 11, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 11, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 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.