Expired Canadian patentCanada
Streptolysin o antigen derivative, its production and uses
CA 2003307 C · Owner: Kehoe, Michael · Inventors: Kehoe, Michael
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A non-toxic and non-cytolytic derivative of streptolysin O which retains at least one (preferably immunodominant) epitope is produced, and can be used especially in diagnostic tests for detecting of the presence of antibodies to Streptococcus pyogenes in a sample.
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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 November 17, 1989 and granted June 19, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 17, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 17, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 17, 1989
GrantedJune 19, 2001
Term endedNovember 17, 2009
Patent numberCA 2003307 C
Classification (IPC)C07K14/31 +1 more
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.