Apparatus for observation in a high velocity liquid stream
CA 1188143 A · Owner: Bains, Paul C. · Inventors: Bains, Paul C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an apparatus capable of observing an object in the path of a liquid stream whilst a radiation receiving part of the apparatus is positioned in the liquid stream. In a preferred form the invention relates to an apparatus capable of monitoring an excavation which uses a high, velocity liquid stream as the means of excavation whilst the excavation is in, progress, the invention comprising radiation receiving means for observing an object when the radiation receiving means is in a clear liquid stream flowing towards the object, the radiation receiving means comprising an observation window and cavitation prevention means disposed adjacent the observation window …
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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
- Granted June 4, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 2002.
- 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.