Purification of pertussis haemagglutinins
CA 1114293 A · Owner: Public Health Laboratory Service Board Limited · Inventors: Maclennan, Alastair P.; Irons, Laurence I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The Leukocytosis Promoting Factor (LPF) of Bordetella haemagglutinin (HG) is separated from crude cell supernatant or partially purified protein by affinity chromatography on a column material consisting of an insoluble polymeric support to which is bound a sialoprotein (glycoprotein containing sialic acid) or other substance rich in sialic acid. The sialoprotein was preferably a plasma sialoprotein such as haptoglobin or ceruloplasmin or a salivary mucin and the, polymeric support was preferably an agarose gel though other conventional sup-, ports could be used. By this process on treatment of an ammonium sulphate precipitated extract, the haemagglutinating activity may be increased …
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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 December 15, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 1998.
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Timeline
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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.