Method for analyzing different sulphur forms
CA 1252705 A · Owner: Her Majesty In Right Of Canada As Represented By The Minister Of Energy, Mines And Resources Canada · Inventors: Sirois, Louis L.; Moon, Kwang S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1-, Abstract:, A method is described for quantitatively determining the different forms of sulphur present in a sample of material, such as coal. The sulphur-containing sample is burned in finely divided form within a confined combustion chamber at a predetermined elevated temperature. Combustion gases are continuously removed from the chamber and these pass through an infrared analyzer which continuously monitors the intensity of the infrared spectra for sulphur dioxide in the combustion gases. The infrared intensity is measured as a function of combustion time of the sample to obtain peaks in the infrared intensity-time pattern indicative of different forms of sulphur. From these pattern …
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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 April 18, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 18, 2006.
- 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
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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.