Treating solid, especially aluminum, surfaces
CA 2336137 A1 · Owner: Henkel Corporation · Inventors: Mccormick, David R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To improve at least one of the hydrophilicity corrosion resistance, and , adhesion by subsequently applied paints a solid surface, preferably an , aluminum alloy surface is treated with an initial treatment liquid that comprises water and dissolved, dispersed or both dissolved and dispersed , polymers that include substantial mass fractions of benzene rings that are substituted with at least one oxygen atom and at least one substituted aminomethylene moiety on each ring, and then treated with a secondary treatment liquid that comprises water and vanadate anions.
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 June 22, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 22, 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.