Nickel shell door molds
CA 2182971 C · Owner: Weber, Reinhart · Inventors: Sheppard, Robert E.; Weber, Reinhart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of forming a nickel shell for a mold insert to reproduce an article surface and a novel nickel shell insert are disclosed. The method comprises securing the article to be reproduced to a base having a perimeter forming a dam about the perimeter, filling the interior of the dam with a silicone, mounting a register plate over the article within the dam in contact with the silicone and allowing the silicone, to cure whereby the silicone forms a negative master of the article surface removing the negative master from the article and positioning a steel mandrel (10) over the negative master to define a cavity therebetween feeding a silicone which is not adherent to the negative master …
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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
- Filed February 9, 1995 and granted July 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 9, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 2017.
- 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.