Flow control system
CA 2108751 A1 · Owner: Timpany, Peter L. · Inventors: Timpany, Peter L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Existing devices for controlling flow in water and wastewater treatment systems utilize mechanical valves adjustable height weirs and gates which are expensive to manufacture and maintain, and in some circumstances such as during winter, difficult to operate. A relatively simple substitute for such devices to control the flow from one zone or area to another includes a casing defining a weir chamber a, submerged weir in the chamber, an inlet on one side of the casing for introducing liquid into the chamber a liquid outlet from the, chamber on the other side of the weir connected to a second zone, or area at a flooded level below the liquid level in the second zone or area, and a duct in the …
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 October 19, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 2015.
- 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.