Method of and device for suction transporting
CA 2257845 C · Owner: Vasiliev, Victor · Inventors: Vasiliev, Vladimir; Fedosov, Yury; Litvin, Simon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transporting line (2) for suction transporting has an inlet (4) an outlet, and an interior (3) therebetween. Suction is applied to the transporting line (2) by a suction source (1) producing a suction force therein such that a material (6) is transported through the transporting line (2) from the inlet (4) to the outlet. The suction force is modulated with a modulator (7) by communicating the interior (3) with atmosphere through a passage (8) and periodically changing with a valve (10) an area and a shape of the passage (8) during the transporting, and also changing a frequency of the modulation in dependence on the distance between the inlet (4) of the transporting line (2) and …
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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
- Filed March 17, 1998 and granted December 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 17, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 2020.
- 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.