Process and apparatus for treating waste
CA 2289127 A1 · Owner: United States Filter Corporation · Inventors: Buehler, Verne T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method for the treatment of waste solids that allows for the direct transfer of heat between host waste solids and cold waste solids in a tube-in-tube heat exchanger (42). Cold solid waste is moved from a cold solid waste source (20) through one tube of the heat exchanger and hot solid waste , is moved from a hot solid waste source (64) through the other tube of the tubein-tube heat exchanger (42), and heat is transferred from the hot solid waste to the cold solid waste. The waste treatment including the heat exchange, can , occur in a batch mode or in a continuous mode.
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 6, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 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.