Metal corrosion-inhibiting coating composition comprising aminoalkylphosphonic acids
CA 2197144 A1 · Owner: Kramer, Andreas · Inventors: Braig, Adalbert; Wolf, Jean-Pierre; Kramer, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A description is given of compounds of the formula (see fig.I), in which the general symbols are as defined in claim 1 and of their zirconium, bismuth and, calcium salts and of the salts with the compounds of the formula II (see fig.II), in which the general symbols are as defined in claim 1 as corrosion inhibitors in coating, compositions for protecting metallic surfaces.
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 February 10, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 10, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 10, 2019.
- 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.