Stripper plate retaining ring
CA 2034675 C · Owner: Chatham, Stephen Kenneth · Inventors: Chatham, Stephen Kenneth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for selectively securing a stripper plate on a punch guide assembly. The device includes an annular retaining ring adapted to retain the stripper plate on the guide assembly. A resiliently biased plunger is disposed adjacent the guide assembly, and selectively maintains the retaining ring in a predetermined rotational position relative to the guide assembly. The retaining ring includes at least one retaining surface, and the guide assembly includes at least one flange for selective engagement with the retaining surface to secure the retaining ring and guide assembly against relative axial movement. A method is disclosed including the steps of placing the stripper plate on the guide …
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 January 21, 1991 and granted August 6, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 21, 2013.
- 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.