Method and apparatus for regulating and terminating fluid flow
CA 2323485 A1 · Owner: Flow Design, Inc. · Inventors: Weber, Robert T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluid valve for controlling flow of a fluid from an upstream region to a downstream region includes a housing having a fluid exit a fluid entry member , having a sidewall and a shut-off member associated with the housing. The sidewall and the fluid entry member is formed with at least one regulating aperture for receiving fluid from the upstream region and a second aperture for receiving fluid from the upstream region. The fluid entry member is movably disposed within the housing such that the at least one regulating aperture has an effective area exposed to the upstream region that decreases as a pressure differential between the upstream region and the downstream region …
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, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2021.
- 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.