Isolation of immunoglobulins
CA 2876986 C · Owner: Dpx Holdings B.V. · Inventors: Lihme, Allan Otto Fog; Hansen, Marie Bendix
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a novel method for the isolation or purification of immunoglobulins (a special class of proteins) from a solution containing immunoglobulins e.g. hybridoma cell culture supematants animal plasma or sera, or colostrum. The method includes the use of a minimum of salts such as lyotropic salts, in the binding process and preferably also the use of small amounts of organic solvents in the elution process. The solid phase matrices preferably epichlorohydrin activated agarose matricees are functionalised with mono- or bicyclic aromatic or heteroaromatic ligands (molecular weight: at the most 500 Dalton) which preferably, comprises an acidic substituent e.g. a …
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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 1, 1997 and granted August 29, 2017. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 1, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 1, 2019.
- 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.