Concurrent-flow multiple hearth furnace for the incineration of sewage sludge filter-cake
CA 2107480 A1 · Owner: Lado, Ernest A. · Inventors: Lado, Ernest A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and process for the incineration of sewage sludge in a concurrent-flow multiple hearth (116) furnace-incinerator (110) which complies with the fundamental thermodynamic conditions required to establish a sustained and stable combustion condition. The sewage sludge is supplied by conveyor (130) and is incinerated to a truly inert and odorless ash while yielding off-gas which, has been turned free of all malodorous and condensable volatiles from which trouble-free steam from boiler (112) and in-house electric power can be commercially produced and an excess sold to the local utility company.
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 March 26, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2014.
- 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.