Flame treated turbidity sensor
CA 2421535 A1 · Owner: Durfee, Anthony L. · Inventors: Miilu, John H.; Durfee, Anthony L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved turbidity sensor is provided with a pair of spaced apart arms respectively housing a light transmitter and a light receiver with the , receiver, adapted to sense the light from the transmitter and generate a corresponding output, signal. The opposing surfaces of the arms adjacent the transmitter and receiver are, flame treated for approximately one second each so as to raise the surface energy, such that bubble-induced noise is reduced or eliminated for a more accurate output, signal.
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 March 10, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 10, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2025.
- 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.