Metal-chelating diphenolamine oligomers for corrosion inhibition of metal substrates
CA 1304413 C · Owner: Chattha, Mohinder S. · Inventors: Chattha, Mohinder S.; Siegl, Walter O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to an water-soluble or water-dispersible diphenolamine oligomeric metalchelating compound, method for making same aqueous, composition comprising the compound useful to deposit a corrosion preventive and adhesion promoting coating on a metal substrate and a method for doing same. The composition has a pH of between about 2 and about 10.
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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
- Granted June 30, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 2009.
- 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
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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.