Volumetric flowmeter
CA 2060174 A1 · Owner: Watanabe, Touichi · Inventors: Watanabe, Touichi; Yamaguchi, Masanobu; Achiwa, Noriyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A volumetric flowmeter comprising a casing that intervenes in a flow channel of a fluid a movable portion, that rotates or reciprocates in the casing to continuously deliver the fluid filled in the space of the casing the, movable portion being entirely or partially formed with a light permeable member for allowing a light to permeate from one to the other wall sides of the casing opposed on both sides of the movable portion, and a light transmission system and a light receiving system for transmitting and receiving the light through the light permeable member at a position at which the permeable member passes or arrives intermittently. Flow rate of a fluid either permeable or impermeable, …
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 January 30, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2014.
- 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.