Process for transporting particulate material
CA 1248906 A · Owner: Shell Canada Limited · Inventors: Eckstein, Gunter K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Particulate material is transported from a low pressure zone to an elevated pressure zone by, - passing the material from the low pressure zone to the top of the first one of a number of vertical oblong vessels; - passing the material in each vessel by gravity as a moving bed from the top of the vessel to the bottom thereof; - passing the material from the bottom of each vessel but the last one to the top of the subsequent vessel by means of a carrier gas which is separated from the material at the top of each vessel and recycled to the bottom of an earlier vessel than the immediately preceding vessel in the series; - discharging the powder from the bottom of the last vessel to the elevated …
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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
- Granted January 17, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 17, 2006.
- 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.