Process for the preparation of phosgene
CA 1067097 A · Owner: Societe Toulousaine De Produits Chimiques Tolochimie · Inventors: Forschner, Peter; Montazeau, Francois; Doubovetzky, Serge
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Phosgene is prepared from chlorine and carbon monoxide by plural stage catalytic interreaction wherein all of the chlorine requirement and at least some but less than all of the carbon monoxide requirement is introduced to a first stage reaction zone with the remaining required carbon monoxide being introduced to downstream reaction zone(s) serially connected to said first stage reaction zone.
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
- Granted November 27, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 27, 1996.
- 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.