Dredging apparatus
CA 2248097 A1 · Owner: Beaumont, Robert Walter Deane · Inventors: Beaumont, Robert Walter Deane
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dredging apparatus comprising a body (11) mounting thrust means (23 24) to , direct, in use, a wash of water downwards towards an area of sea bed or the like, connection means (12, 13) to connect said dredging apparatus to a support means (10) above the sea bed, said connection means (12 13) including , attitude adjusting means to selectively adjust the attitude of the dredging apparatus in a side to side (roll) orientation.
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 February 27, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2019.
- 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.