Rotary pipe conveyor apparatus for granular materials
CA 2059018 A1 · Owner: Stride, Steven · Inventors: Stride, Steven
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotary pipe conveyor apparatus for conveying granular materials comprises a hopper and an inclined rotary delivery tube rotatable about its longitudinal axis and the hopper is connected to the delivery tube by means of a rigid connector having a bore of elliptical cross-section and an annular groove around the bore at its lower end in which the upper end of the delivery tube is located. The apparatus is of particular use for making controlled additions of granular materials to molten metal.
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 January 8, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 8, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 8, 2014.
- 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.