Apparatus and method for monitoring soil moisture conditions and for maintaining soil moisture conditions
CA 2410183 A1 · Owner: Campau, Daniel N. · Inventors: Campau, Daniel N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to an apparatus and a process which is low-cost, simple to use reliable and long-lived, and will effectively monitor the moisture condition of a volume of soil. In accordance with the invention a light transmitting, rod is placed into the soil so that its lower end is within the soil and its upper end is visible from outside the soil volume. The lower end of the rod is beveled to reflect light entering the rod from its upper end back toward the upper end. In accordance with the method of the present invention observance of the, presence or absence of light at the upper end of the rod determines the moisture content of the soil. That is the, presence of …
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 28, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 28, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2024.
- 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.