Composition and process for treating metal
CA 2172632 A1 · Owner: Henkel Corporation · Inventors: Dolan, Shawn E.; Reghi, Gary A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Heating an aqueous mixture of a fluoroacid such as H2TiF6 and an oxide hydroxide, and/or carbonate such as silica produces a clear mixture with long term stability against settling of any solid phase even when the oxide, hydroxide, or carbonate phase before heating was a dispersed solid with sufficiently large particles to scatter light and make the mixture before heating cloudy. The clear mixture produced by heating can either be mixed with water soluble and/or water dispersible polymers for example with dispersed , polymers of the diglycidyl ether of bisphenol-A or an acrylic acid polymer or , with soluble hexavalent and/or trivalent chromium to produce a composition , that improves …
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 September 28, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 2016.
- 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.