Core plug formation die apparatus and method of manufacturing a core plug
CA 2259800 C · Owner: Mercury Products Corp. · Inventors: Splitt, Jerome
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for manufacturing a core plug from a core blank having an outer rim a top surface and a bottom surface. The method comprises positioning the core blank into a stamping apparatus. Subsequently a recess is stamped into the outer rim of the bottom surface of the core blank. Next the bottom surface of the core blank is positioned in a blank accepting region of a second die member of a core die formation apparatus. The core blank is then propelled through an opening extending through the second die member and, the outer rim is deformed inward and upward thus forming the core plug. The deformation does not affect the recessed region of the resulting core plug. The invention additionally …
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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 January 21, 1999 and granted November 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 21, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 21, 2021.
- 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
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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.