Dispensing apparatus and method
CA 2276679 A1 · Owner: Campbell, John · Inventors: Campbell, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for dispensing a liquid material from a reservoir (12) the, apparatus comprising a first vessel (11) which forms an intermediate chamber and which is arranged to receive material from the reservoir (12), a second vessel (10) which forms a dispensing chamber and which is arranged to receive material from the intermediate chamber (11), first pressurising means whereby the intermediate chamber (11) can be pressurised, second pressuring means whereby the dispensing chamber (10) can be pressurised first valve means (13), operable to permit material to be admitted into the intermediate chamber (11) from the reservoir (12), second valve means (14) operable to permit material to be …
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 June 25, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 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.