System and method for treatment of animal waste
CA 2384958 A1 · Owner: Ehrlich, Robert T. · Inventors: Ehrlich, Robert T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Waste from confined animal feeding/growing operation is flushed from barn (10) and routed to an enclosed anaerobic digester (1 2). A liquid portion (46) of , the digested waste is further treated with aerobic digestion (18) and then clarified (20) liquid is used to flush the barn (10) and restart the cycle. Highwater volume used for frequent flushing of the barn combined with enclosed anaerobic digestion leads to control of odors.
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 August 28, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 28, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 2023.
- 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.