Sludge de-watering press
CA 2095292 A1 · Owner: Langner, Herbert G. J. · Inventors: Langner, Herbert G. J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved strainer member and housing therefor which, strainer member and housing are for use in a sludge de-watering press, are disclosed. The housing defines a longitudinal chamber that houses a generally cylindrical strainer member. The inner wall of the strainer member defines an internal passageway. An auger means is rotatably mounted within the internal passageway to advance sludge along the passageway from an inlet port to an outlet port. The strainer member is adapted to retain the relatively solid portion of the sludge within the passageway and to allow passage of the fluid portion of the sludge therethrough into the chamber. The improvement comprises the housing being divided …
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 April 30, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 30, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 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.