Expired Canadian patentCanada
Boronic acid adducts of metal dioxime complexes useful in labelling proteins and other amine-containing compounds
CA 2039218 C · Owner: E.R. Squibb & Sons, Inc. · Inventors: Ramalingam, Kondareddiar; Linder, Karen E.; Nunn, Adrian D.
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Boronic acid adducts of metal dioxime, complexes are useful as reagents for labeling proteins and other amine-containing compounds.
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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 March 27, 1991 and granted March 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 27, 1991
GrantedMarch 30, 1999
Term endedMarch 27, 2011
Patent numberCA 2039218 C
Classification (IPC)C07K16/00 +2 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.