Method and equipment for reprocessing fragment-type fractions and/or free-flowing materials
CA 2040491 A1 · Owner: Gahler, Franz · Inventors: Gahler, Franz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and equipment for reprocessing loose materials, in particular for reprocessing fragment-type fractions and/or free-flowing materials is proposed, the, loose materials arising as fractions or free-flowing sand being reprocessed by the method and the equipment to give a re-utilisable quality approximately as new. The plant (50) designed for wet treatment comprises essentially a washing vessel (10) which is interactively connected via at least two sonic transducers (16, 17) to a correspondingly associated ultrasonic device (15). For the thermal treatment a drum-type, furnace (20) with a heatable combustion chamber (21') is also provided in which a piping system (40) mounted for …
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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 15, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2013.
- 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
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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.