Circular punch
CA 2325178 A1 · Owner: Phillips, Michael T. · Inventors: Phillips, Michael T.; Giovanni, John H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cutting tool, one embodiment of which is a circular punch for cutting holes in, flexible material such as plastic film. The punch has a cylindrical body with an array of, primary and secondary teeth at one end. The apexes of the primary teeth lie at the end of, the cutting edge of the punch and the secondary teeth are disposed between adjacent, primary teeth and their apexes are substantially in the plane of the roots of the primary, teeth. The primary and secondary teeth have beveled edges.
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 November 7, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 7, 2022.
- 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.