Canadian application, no grantCanada
Variable undershot waterwheel
CA 2061768 A1 · Owner: Small, Richard J. A. · Inventors: Small, Richard J. A.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Page 2, This type of water wheel can be placed directly in a moving water system, and be allowed to maintain a constant speed (power output) by adjusting the height the water wheel sits, as the water level rises and falls
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 24, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 24, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 24, 1992
GrantedNo grant recorded
Term endedFebruary 24, 2012
Patent numberCA 2061768 A1
Classification (IPC)F03B7/00
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.