Apparatus for recovering elemental sulphur
CA 1307653 C · Owner: Mcdougall, David W. · Inventors: Mcdougall, David W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
23 -, 2720- 02.5, ROGERS, BERESKIN & PARR C A N A D A Title: APPARATUS FOR RECOVERING, ELEMENTAL SULPHUR Inventor: DAVID W. McDOUGALL, ABSTRACT OF THE DISCLOSURE A piping arrangement for two or three Claus catalytic converters and condenser sets used for recovering sulphur from gas streams containing hydrogen sulphide. One of the converters is operated at a sub-dewpoint temperature while the other(s) is(are) operated at a higher temperature for regenerating the catalyst. The piping arrangement includes two four-way switching valves that allow an influent gas stream to be switched between the two converters without leaving stagnant gas in the piping.
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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 September 22, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 2009.
- 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.