Improved column for dna separation by matched ion polynucleotide chromatography
CA 2375746 A1 · Owner: Gjerde, Douglas T. · Inventors: Roque, Raquel; Haefele, Robert M.; Hecker, Karl H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved separation column and method for separating a mixture of double stranded DNA fragments by Matched Ion Polynucleotide Chromatography. The cylindrical column has an ID greater than about 5 mm and contains polymer beads. The beads have an average diameter of 1 to 100 microns and are unsubstituted polymer beads or are polymer beads substituted with a hydrocarbon moiety having from 1 to 1,000,000 carbons. The preferred beads are characterized by being substantially free from multivalent cations which are free to bind with DNA. The improved column provides enhanced separation of DNA fragments with sizes ranging from about 100 to 20,000 base pairs. The column also provides …
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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 September 18, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 18, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 18, 2022.
- 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.