Process for phosphate conversion coating treatment
CA 1082575 A · Owner: Nippon Paint Co. Ltd. · Inventors: Zinnouti, Masahiro; Murakami, Ryoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for treatment of phosphate conversion coating for iron and steel which includes a multi-step water rinsing stage after the conversion coating stage which, comprises subjecting a part of the rinsing water used therein to a reverse osmosis treatment returning the, concentrated liquid thereof to the conversion coating stage and using the filtrate as replenishing water for the conversion coating and/or the digressing and water rinsing stages after subjecting it to the ion exchange treatment. - 1 -
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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 July 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 29, 1997.
- 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.