Water circulation systems for ponds, lakes, and other bodies of water
CA 2723331 C · Owner: Medora Environmental, Inc. · Inventors: Obritsch, Tait J.; Bleth, Joel J.; Tormaschy, Willard R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Circulation systems for ponds, lakes, or other bodies of water. In one set of embodiments (1) water is drawn up from the depths of the body (4) for exposure to the atmosphere and to generate an overall high flow circulation pattern throughout the entire body (4). In other embodiments (1') the circulation in the body of water (4') is primarily limited to an upper aerobic zone (20) with only small and controlled volumes from a lower anaerobic zone (22) being brought up. Each system preferably includes a flotation platform (3) dish (19), impeller (21), and draft tube (5,5') with specific modifications to the various systems to adapt them for use in a variety of environments.
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 December 30, 2003 and granted November 19, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 30, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 30, 2025.
- 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.