Barrier seal for conveyor skirtboard
CA 2044318 C · Owner: Martin Engineering Company · Inventors: Veenhof, Willem D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a conveyor belt assembly for conveying particulate material, a rigid primary seal is mounted between the inboard loading zone and an outboard region of the belt which is desired to remain clear of particulate material. A flexible secondary seal is mounted between the primary seal and the outboard region and includes a flexible sheetlike member having a sealing portion resting with light sealing pressure in sliding contact with the upper belt surface.
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 11, 1991 and granted October 25, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 11, 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.