Selective and continuous removal of metal-ion contaminants from plating baths
CA 1249566 A · Owner: Bend Research, Inc. · Inventors: Babcock, Walter C.; Friesen, Dwayne T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is disclosed for the selective removal of metal ions from plating solutions comprising contacting the plating solutions with liquid organic complexing agents such as oximes or phosphoric acid esters or microporous material, preferably anisotropic the microporous material being impregnated with such substances. The microporous material may be in various forms, including beads, fibers, sheets and gels. Copper zinc and iron contaminants are effectively removed from nickel-plating solutions.
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 January 31, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 31, 2006.
- 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.