Solar cellepowered moisture absence detection guage
CA 2020980 A1 · Owner: Mooney, Thomas · Inventors: Mooney, Thomas; Mooney, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A moisture absence alarm comprising a permanently insulated conductivity sensor probe, a shielded solar cell DC power source, a digitalized sonar pattern and audio signaller and circuitry means to connect these. When conditions in a substrate have changed from moist to dry,the difference in impedance between two terminals of the inserted probe causes an audio signal to occur which is modulated for pitch, frequency and rhythm by the changing lux conditions as detected by a shielded solar cell power source. The alarm continues during ambient light availability until moisture is added to the substrate at which point the sounder falls silent.
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 July 12, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 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.