Polymers for separation of biomolecules by capillary electrophoresis
CA 2179013 C · Owner: Menchen, Steven M. · Inventors: Efcavitch, William J.; Grossman, Paul D.; Menchen, Steven M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides uncharged water-soluble silica-adsorbing polymers for suppressing electroendoosmotic flow and to reduce analyte-wall interactions in capillary electrophoresis. In one aspect of the invention one or more of such, polymers are employed as components of a separation medium for the separation of biomolecules, such as polynucleotides polysaccharides, proteins, and the like by capillary electrophoresis. Generally such polymers are characterized by (i)water solubility over the temperature range between about 20°C to about 50°C (ii) concentration in a separation medium in the range between about 0.001 % toabout 10 % (weight/volume) (iii) molecular weight in the range of about …
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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 December 6, 1994 and granted September 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 6, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 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.
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.