Methods for regenerating a sulfur scavenging compound from a product of a sulfur scavenging reaction
CA 2134445 C · Owner: Trauffer, Edward A. · Inventors: Trauffer, Edward A.; Evans, Robert D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methods are provided whereby an N-C-N compound is regenerated from a product of a sulfur scavenging reaction in which said N-C-N, compound removes a sulfur atom from a sulfur compound to form, the original N-C-N compound. The N-C-N compound is represented by formula (I). The product includes a hereto compound having sulfur carbon and nitrogen atoms in its backbone. In one embodiment the, product is muted with (1) a nitrogen compound represented by formula (II) and (2) an alkaline compound selected from alkali metal alkaline, earth metal and transition metal compounds to form a solution, slurry or, dispersion. The hereto compound is reacted with the nitrogen compound in the presence of the …
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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
- Filed February 17, 1994 and granted September 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 17, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 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.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.