Process for the urea synthesis from ammonia and carbon dioxide and apparatus for carrying out the process
CA 2265459 A1 · Owner: Lagana, Vincenzo · Inventors: Lagana, Vincenzo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A urea synthesis process starting from ammonia and carbon dioxide carried out under a pressure of 120x102 to 400x102 KPa and a temperature of 140 to 215 ~C in which the reaction takes place in a reactor in which gaseous CO2 is fed in the bottom of the reactor while liquid ammonia and the recycled ammonium carbamate aqueous solution are fed from the top of the reactor and going , downward the reactor, they meet in countercurrent the rising gaseous CO2.
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 July 22, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 2019.
- 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.