Method and apparatus for gravimetric dosing bulk material
CA 2469267 C · Owner: Wolfschaffner, Hubert · Inventors: Wolfschaffner, Hubert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to increase the dosing accuracy of a dosing device the bulk material , is temporarily stored upstream from a reservoir (1)in an intermediate storage container (6) and is transferred only when a compensating pressure value is reached. The invention also relates to a corresponding device with a valve lock (4,5) on the intermediate container (6).
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 November 4, 2002 and granted September 11, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 4, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 4, 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.