Headbox
CA 2070112 C · Owner: Petschauer, Franz · Inventors: Petschauer, Franz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a headbox (7) for a device for separating liquid from solid/liquid mixtures, in particular solid matter suspensions or slurries consisting of a feed channel (10) followed by a cross distributor which is, formed tapering in the direction of material supply having a dewatering zone, (12) arranged downstream in the direction of flow of the material to bedewatered. The invention is characterized primarily in that in the dewatering zone (12) the material to be dewatered may be guided through between at least one associated endless screen belt (2) which, according to the case, may be, guided along a supporting structure (4) advantageously formed as a plate or formed by at …
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 1, 1992 and granted April 22, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 1, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 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.