Method of preparing polymer surfaces for subsequent plating thereon and improved metal-plated plastic articles made therefrom
CA 2072398 A1 · Owner: Zarnoch, Kenneth P. · Inventors: Zarnoch, Kenneth P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
RD-21,551, METHOD OF PREPARING POLYMER SURFACES FOR SUBSEQUENT PLATING THEREON AND IMPROVED METAL-PLATED PLASTIC ARTICLES MADE THEREFROM, Abstract of the Disclosure Method of modifying an aromatic polymer surface to improve adhesion of a metal layer thereon and to the articles produced therefrom. The surface of the aromatic polymer such as polycarbonate, is nitrated by a contact with a nitrating solution such as a mixture of nitric and sulfuric acid and then hydroxylated by a contact with a hydroxylating solution such as ammonium hydroxide. The hydroxylated surface is thus chemically modified to become hydrophilic. The chemically modified surface is electrolessly plated with a primary metal …
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 June 25, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2014.
- 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.