Optical turbidimeter with a lens tube
CA 2448442 A1 · Owner: King, Karl · Inventors: Woodward, John R.; Dickey, Terry L.; King, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for measuring tubidity of a liquid has a tubular lens (42) of transparent material with an aperture for receiving the liquid. First and second first light emitters (32, 36) are positioned adjacent the tubular lens (42) to produce two beams of light each diverging at a predefined angle and impinging the tubular lens (42). The tubular lens refracts the diverging beams of light from the two light emitters (32 36) into separate collimated beams , within the aperture. A first light detector (34) positioned adjacent the tubular lens diametrically opposite to the first light emitter and a second light detector (38) positioned diametrically opposite to the second light emitter.
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 May 21, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 21, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 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.