Boron silicates, aluminum silicates, phosphosilicates and purification of dna
CA 2102264 C · Owner: Woodard, Daniel Lee · Inventors: Woodard, Daniel Lee; Howard, Adriann Jeanelle; Down, James Arthur
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention discloses boron silicates aluminum silicates, and phosphosilicates how to make them, and processes for, purifying DNA with them. The new composition is of the formula: wherein X is Silicon, Boron, Aluminum or Phosphorus and R is, independently OH or a monomer unit n is 3 when X is Si and n, is 2 when X is Boron Aluminum, or Phosphorus, and repeating units of the composition comprising the formula: and compositions comprising the above monomer and repeating units thereof. Repeating units described above can include from about 2 up to infinity. Ranges include about 2 to about 100,000,000, and about 2 to about 100,000.
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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 November 2, 1993 and granted August 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 2, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 2015.
- 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
Timeline From CIPO dates
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.