Methods for roof, wall and floor leak detection
CA 2023376 A1 · Owner: Shih, Ishiang · Inventors: Shih, Ishiang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention describes a method to detect leaks in a roof or leaks in basement walls or floors of a building. The detection is achieved by placing a two wire detector in the region to be monitored and measuring the current with a voltage applied across the two wires. The location of the leak is determined by placing several wire detector pairs in a mesh fashion and then scanning the leakage current through each wire pair. A complete detection and scanning system is also described. (August 5 1990)
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 August 13, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 13, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 13, 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.