Edm electrode for creating a gear tooth form having a tooth shape in a cavity component and method of making an edm electrode
CA 2242111 C · Owner: Tabor, David G. · Inventors: Tabor, David G.
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 working electrical discharge machining electrode for creating an injection mold having a gear form. A cutter tool having a single cutting surface is formed and the cutter tool is used to, machine the electrode to form a tooth surface having the same curvature as the single cutting surface. In machining the electrode a longitudinal axis of the, cutter tool is substantially perpendicular to a longitudinal axis of an EDM electrode blank.
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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 July 2, 1998 and granted September 18, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 2, 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.