Device for the removal of aquatic vegetation
CA 2028580 A1 · Owner: Wright, Peter · Inventors: Wright, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aquatic harvester device is disclosed for the safe and efficient removal of vegetation from a river lake, or ocean bed. The harvester device comprises a mesh-form rigid, elongate body of generally S-shaped cross-section which has a raised forward face with a smooth edge and a downwardly extending rearward face carrying a plurality of spikes or teeth. In operation, the smooth-edged forward face engages the vegetation while the teeth disposed on the rearward face of the device uproot the plants effectively, removing the plants from the water bed. A method of using the aquatic harvester device is also disclosed and comprises the steps of: lowering the aquatic harvester device to the floor …
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 25, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 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.