Ferrous complexer for autodeposition
CA 1189228 A · Owner: Amchem Products, Inc. · Inventors: Hall, Wilbur S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An autodepositing coating composition for use in forming an autodeposited coating on an iron-containing surface and of the type wherein ferrous iron tends to build up in concentration in the composition and affect adversely the coating capabilities of the composition as it is used continuously to coat iron-containing surfaces, the improvement comprising adding to said composition a carboxylic acid which is effective in forming a complex with said ferrous iron and in an amount effective to decrease the amount of ferrous iron which tends to affect adversely the coating capabilities of the composition.
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
- Granted June 18, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 18, 2002.
- 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.