Gravimetric metering apparatus for pourable materials
CA 2077507 C · Owner: Hafner, Hans Wilhelm · Inventors: Hafner, Hans Wilhelm
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gravimetric metering apparatus for pourable material comprises a rotor rotating about vertical axis. The rotor has the form of a disk divided into four sectors. In a four phase measuring process the individual sectors are cyclically charged with pourable material, weighed and discharged. Preferably an, emptied sector is weighed as well and the determined tare weight is deducted from the brutto weight.
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 September 3, 1992 and granted August 27, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 3, 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.