Process and apparatus for the treatment of plant material
CA 1264601 C · Owner: Pharos Inventions Ag · Inventors: Wiederkehr, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The apparatus comprises a plurality of stages having screw presses, the material passing out from the outlet side of the stages being passed by a transfer duct to the inlet side of the following stage. Each stage has a speed adjustable independently of the speed of the other stages. Compared with known screw presses the advantage exists that, following each treatment in a stage by means of an opening, in the transfer duct the material can be measured, checked, or subjected to an additional treatment. The number of stages can also be adapted to the material being processed and there is also a relatively large freedom with regards to the arrangement of the apparatus.
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
- Granted January 23, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 2007.
- 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.