Flour sifter
CA 2210425 C · Owner: Dart Industries Inc. · Inventors: Decoster, Pieter K.J.; Backaert, Dimitri M.C.J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A manual sifter including a rotor overlying a sifter screen and rotatable in response to longitudinal reciprocation of a drive arm engaging a,crank wheel fixed to the rotor. The drive arm includes a projecting pin engaged within an elongate slot of the crank wheel the drive arm having a cam edge thereon engage with the crank wheel and operative thereagainst to vary the torque applied to the rotation of the crank wheel as the arm reciprocates.
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 July 14, 1997 and granted October 15, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 2019.
- 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.