Tubular heater for preparing carbon monoxide-containing gas mixtures
CA 2129303 C · Owner: Metallgesellschaft Aktiengesellschaft · Inventors: Hohmann, Friedrich; Roll, Werner; Mortel, Hans Gunter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The tubular heater comprises numerous tubes which are disposed in a combustion chamber and contain ca- talyst. A synthesis gas which mainly comprises hydrogen, carbon monoxide and carbon dioxide, is prepared in the tubes. There is a risk of a formation of carbides (metal dusting corrosion) on the outside surface of the outlet ends of the tubes. To prevent such corrosion a gaseous or vaporous protecting fluid which is substantially free of CO, is supplied to the region surrounding the outlet ends of the tubes.
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 August 2, 1994 and granted December 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 2, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 2, 2016.
- 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.