Apparatus and method for treatment of waste water sludge
CA 2129845 C · Owner: Soule, Bruce E. · Inventors: Soule, Bruce E.; Kritzer, Robert M.; Kew, Alan S.
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 treating liquid waste water sludge after its generation and separation from the waste liquid involves propelling a plurality of separate streams of sludge via, for instance, a rotor (37) and then forcibly impacting sludge particles and microbial cells contained in the propelled streams of sludge against a contact surface such as a stator (59), for recirculation of sludge along toroidal paths (62) and (64) to thereby , fragment the particles into smaller sized particles and break apart the organic cells. As a result of such a fragmentation process, water located in the pores of the sludge particles is released, thereby enhancing a subsequent dewatering …
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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 February 17, 1993 and granted January 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 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
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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.