Screw conveyor for tacky media
CA 2187724 C · Owner: Bavington, Gregory F. · Inventors: Bavington, Gregory F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A screw conveyor for tacky media has members such as chains disposed in rest positions extending into the trough laterally of the screw axis. These members are engaged and deflected by the screw blade as it progresses along said axis. The members are subject to a restoring moment, such as the force of gravity, tending to forcefully restore the members to the rest position from the deflected positions so that the media is forcefully impacted by the members and adherent media is dislodged from the blade and agglomerates are disintegrated.
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 11, 1996 and granted February 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 11, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 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.