Reagents
CA 2032389 A1 · Owner: Berry, Mark J. · Inventors: Berry, Mark J.; Davis, Paul J.; Verhoeyen, Martine E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved affinity purification media are provided by the use of small specific binding agents especially Fv, antibody fragments or single domain antibody fragments immobilised on porous carriers having pore sizes in the range 30-1000 angstroms, preferably 30-300 angstroms. Silica is a preferred carrier. The small fragments are able to penetrate the pores and maximise the effective surface area of the carrier, and the microporous silica is sufficiently robust to be used at high pressure so, enabling the speed and/or throughput of a purification procedure to be increased.
Read the whole patent
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 17, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2012.
- 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.