Internal broach for the internal broaching of profiles
CA 2188980 C · Owner: Oswald Forst Maschinenfabrik Und Apparatebauanstalt Gmbh & Co. Kommanditgesellschaft · Inventors: Melcher, Reinhard; Holstein, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An internal broach for the broaching of profiles defined by a bottom and flanks, in particular of internal toothings in a workpiece is provided with, broach cutting teeth which have bottom-cutting edges and flank-cutting edges. Over their full profile height, the flank-cutting edges of broach cuttingteeth disposed one after the other and allocated to each other have an ascending profile in the range of 1µm to 3µm
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 October 28, 1996 and granted May 30, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2018.
- 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.