Bacterial antigens, antibodies, vaccines, and methods of manufacture
CA 1305918 C · Owner: Wessels, Michael R. · Inventors: Wessels, Michael R.; Kasper, Dennis L.; Jennings, Harold J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure Antigens and vaccines containing purified oligomers (1-50 units) of the repeating pentasaccharide unit of type III Group B Stretococcus (III GBS) polysaccharide capsule. Methods of making the antigen by recovering polysaccharide from cultured III GBS or medium and digesting the polysaccharide with a specific endo-B-galactosidase. Enzymatic cleavage of bacterial polysaccharide to make purified oligomers. A purified trypsin-resistant C surface protein, m.w. about 14,000 and vaccine. Passive immunization using the above vaccines. Immunoassays for GBS immunodeterminants or anti-GBS antibodies.
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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 August 4, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 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.