Screw press
CA 2135757 C · Owner: Scheucher, Peter · Inventors: Scheucher, Peter; Paier, Gerhard; Schinninger, Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A worm press for separating liquids from solids-liquid mixtures, the press including a worm formed as ribs on a shaft for rotation inside a worm jacket having liquid passages. The shaft of the worm includes in the, axial-conveying direction following at least one worm rib a, ribless terminal region in which the worm shaft is in the form of a jacket shaft, provided with a cavity between a shaft jacket and a shaft core. The shaft jacket includes liquid passages leading into that cavity the cavity being, in fluid communication with at least one liquid drainage means. The cavity is formed in the ribless terminal region of the worm shaft, between the shaft core which tapers in, the …
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 May 14, 1993 and granted February 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 14, 2015.
- 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.