Compositions containing plant-produced glycopolypeptide multimers, multimeric proteins, and their use
CA 2071502 A1 · Owner: Haitt, Andrew C. · Inventors: Hein, Mich B.; Haitt, Andrew C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention contemplates a transgenic plant having somatic and germ cells containing at least two mammalian genes coding for polypeptides capable of autogenously associating with each other to form a biologically active multimer. The present invention also contemplates glycopolypeptide multimers having a polypeptide that contains an immunoglobulin amino acid residue sequence and an oligosaccharide that comprises a core pentasaccharide and N-acetylglucosamine-containing outer branches such that the, multimer is free from sialic acid. The production of passive immunity against a preselected antigen by administering a sialic acid free glycopolypeptide multimer to an animal is also …
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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 October 25, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 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.