Adjustable valve for filters
CA 2021210 C · Owner: Beloit Technologies, Inc. · Inventors: Carboneau, Marcel Antonio; Smythe, Richard Lanctot; Clarke-Pounder, Ian James Henry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an adjustable valve for use with filters wherein internal valve partition members effect the relative duration and timing of atmospheric and vacuum portions withdrawal of the filtrate from the filter and further provide for their distribution to sump wells depending on the concentration of particulate matter contained in the filtrate portions. Timing and apportionment of the filtrate is accomplished by a combination timing plate and valve housing containing movable valve partitions, the valve body being in communication with a vacuum box and atmospheric drains.
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 March 30, 1990 and granted October 17, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 2012.
- 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.