On-line supercritical fluid extraction multidimensional chromatographic system
CA 2092082 A1 · Owner: Campbell, Robert M. · Inventors: Campbell, Robert M.; Cortes, Hernan J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An on-line supercritical fluid extraction multidimensional chromatographic system (10) and method is described which provides a cell (16) for extracting a target compound in supercritical fluid and a restrictor interface (26) for trapping the extracted target compound while decompressing and venting the supercritical fluid. A pump (34) and valve (24) arrangement is provided to convey the trapped target compound through a micro LC column (36) for separating (and detecting) constituents of interest from interfering species, and ultimately introducing constituent of interest into a gas chromatograph (40) for analysis. The system is characterized as being ''on-line'' in that fluid …
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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 October 8, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2013.
- 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.