Volumetric airlock feeder
CA 2124099 A1 · Owner: Wyssmont Company, Inc. · Inventors: Worden, George Maclean
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A volumetric airlock feeding apparatus includes a rotatable drum assembly constructed from a plurality of straight vanes and curved web segments to define pockets for receiving material to be discharged. Material discharge is facilitated by a cleaning assembly having a plurality of bars which scoop the material to be discharged from their respective pockets during operation of the apparatus. The apparatus can be constructed to have increased material handling capacity for a given size by virtue of the design of the drum assembly.
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 May 20, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 20, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 20, 2016.
- 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.