Method and apparatus for generating a high purity chromatography eluent
CA 2033697 C · Owner: Friedman, Keith A. · Inventors: Dasgupta, Purnendu K.; Strong, Douglas L.; Stillian, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and an apparatus for the generation of a high purity chromatography eluent are provided. In one form of the invention, an eluent generating means defines a source channel and a product channel separated by a permselective ion exchange membrane including exchangeable ions of the same charge as the selected ionic species. The membrane allows passage of ions of the same charge as the ionic species but is resistant to transmembrane passage of ions of opposite charge. Means are provided for applying an electrical potential between the source channel and the product channel. The effluent from the product channel is directed to chromatographic separation means. Means are also provided for …
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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 January 7, 1991 and granted August 7, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 7, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 2013.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.