Method and apparatus for detecting liquid and gas segment flow through a tube
CA 2254690 A1 · Owner: Kleinschmitt, David · Inventors: Kleinschmitt, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bubble detector/direction sensor for detecting the presence of liquid and gas in a stream of liquid and gas segments flowing through an elongated transparent tube and for sensing the direction of flow of the stream. The sensor has first and second light sources, first and second input fiber optic bundles and first and second, collection fiber optic bundles. The first and second input fiber optic bundles couple the first and second light sources to first and second sides of the tube respectively, so that light passes through the tube. When the tube is filled with liquid the light, passing therethrough from each light source passes through first and second predetermined regions. When the …
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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 November 19, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 19, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 19, 2020.
- 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.