Co-extruded driver pad with wear indicator
CA 2491796 C · Owner: Silverman, David · Inventors: Silverman, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An article conveyor (10) having live rollers (15) driven by a polymeric driver pad (27) which has a wear indicator element (40) co-extruded with the driver pad (27). The element (40) is visually distinct from the pad (27) and has converging sides (42) in the driver pad (27) so that wear on the pad (27) is indicated by the amount of the wear element (40) visible to an observer.
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 June 30, 2003 and granted November 13, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 30, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 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.