Immunosuppressor and method of extraction thereof
CA 1303295 C · Owner: Sinha, Sudhir K. · Inventors: Sizemore, Robert C.; Gottlieb, A. Arthur; Sinha, Sudhir K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel L-4 suppressor material is extracted from leukocytes and purified by size fractionating the extract to produce a first dialyzate having M.wt. cut-off of approximately 12,000 size fractionating the first dialyzate to produce a second dialyzate and a retentate at M.wt. cut-off of approximately 3500 applying the retentate to a reverse phase H PLC column eluting, the column, and collecting the eluant associated with the zone of an acetonitrile -diluent aqueous trifluoroacetic acid gradient wherein the Acn concentration is between approximately 75% and approximately 80%. - 17 -
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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
- Granted June 9, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 2009.
- 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.