Improved cyclone having circular trickle valve assembly
CA 2055330 C · Owner: Tammera, Robert Frank · Inventors: Tammera, Robert Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Figure 3 illustrates, in part, an improved cyclone trickle valve assembly, which includes a cyclone that has a vertical dipleg (21). An annular ring (23) is horizontally disposed in the dipleg(21). A pair of cooperable clamshell doors (24) are positioned within the dipleg and are pivotably supported by the annular ring (23) for mutual opposite swinging movement between a closed position and an open position, thereby substantially preventing gases from progressing upwardly when the doors (24) are in a closed position and permitting solids to progress downwardly when the doors are in an open position.
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 November 12, 1991 and granted June 19, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2013.
- 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.