Anaerobic digestion of fish wastes
CA 1294909 C · Owner: Envirem Technologies Inc. · Inventors: Ferguson, James Riddell
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for anaerobic digestion of fish wastes and production of useful by products including fertilizer and biogas. The method includes grinding up the fish wastes and adding liquid to create a suspension of up to 25% solids; optionally adding lipase to break down the fish oil; and anaerobically digesting the fish suspension over a period of approximately 20 days at a temperature in the range of 35-55°C with mixing provided by recirculation or other means. After digestion the, suspension is pumped to a secondary chamber for storage, further breakdown by mechanical means such as agitation or recirculation, centrifugation to remove suspended solids, production of an enhanced …
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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
- Granted January 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 28, 2009.
- 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.