Liquid waste treatment bioreactor process and apparatus
CA 2259381 C · Owner: Kantardjieff, Alexandra · Inventors: Kantardjieff, Alexandra
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a process and apparatus for biological treatment of liquid waste by an upflow aerobic biofilter and coating of the solid fraction by powder zeolite. The aerobic biofilter comprises a reactor filled with perforated media. The media prevent clogging by suspended material in the manure but allow accumulation of biomass within the reactor and high oxygen transfer.
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 May 4, 1998 and granted August 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 2020.
- 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.