Granulator
CA 2477699 A1 · Owner: Hart, Thomas · Inventors: Hart, Thomas; Ritchie, Jack
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A granulator (10) for reducing the size of plastic particles to facilitate the removal of contaminants therefrom. The granulator includes an upper chamber (36) and a lower chamber (38) defined by an exit screen (20). The upper chamber includes a rotary shear (22) and an air handling system (40 42) for , creating a pressure drop across the screen to facilitate the transit of particulate material therethrough.
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 February 28, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 28, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 2025.
- 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.