Article having a coating
CA 2236151 C · Owner: Masco Corporation · Inventors: Moysan, Stephen R. Iii; Welty, Richard P.; Sugg, Rolin W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An article, particularly a brass article is coated with a, multi-layer coating comprising a semi-bright nickel layer deposited on the surface of the article, a bright nickel layer deposited on the semi-bright nickel layer, a nickel-tungsten-boron layer deposited on the bright nickel layer, a chrome layer deposited on the nickel-tungsten-boron layer, a layer comprised of a non-precious refractory metal deposited on the chrome layer a sandwich, layer comprised of alternating layers of non-precious refractory metal compound, preferably zirconium nitride and non-precious, refractory metal, preferably zirconium deposited on the, non-precious refractory metal layer. a non-precious refractory …
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 April 29, 1998 and granted August 21, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 29, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 29, 2020.
- 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.