A material cutting rotor assembly
CA 2231600 C · Owner: Williams, Robert M. Jr. · Inventors: Becherer, Paul H.; Williams, Robert M. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A material, cutting shaft assembly in which a rotary shaft of hexagonal shape in cross section carries an array of material cutting discs between its opposite ends seat means, adjacent the shaft ends, and disc retainer means adjustable and removably mounted in the seat means to hold the array of cutting discs in operative positions to avoid axially directed load stress conditions.
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 March 9, 1998 and granted November 7, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 9, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 9, 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.