Integrated urea manufacturing plants and processes
CA 2461685 A1 · Owner: Rentech, Inc. · Inventors: Sheppard, Richard O.; Yakobson, Dennis L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A plant for manufacturing urea from carbonaceous materials oxygen from an air , separation unit and water preferably steam, is made up of a syngas generator unit, an air separation unit, Fischer-Tropsch unit a CO2 removal unit, a , hydrogen removal unit a methanator unit, an ammonia converter unit and a urea synthesizer unit. Each of Fischer-Tropsch liquids ammonia, hydrogen and urea , can be recoverable under proper economic conditions. Electrical power is recoverable by the addition of at least one of a steam turbine and a gas turbine which is/are coupled to an electrical generator.
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 September 25, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 25, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 25, 2023.
- 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.