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Generated: December 18, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,418,208

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Summary for Patent: 4,418,208

Title: N-Substituted iminodiacetic acids
Abstract:Complexes of technetium-99m and a compound selected from the group having the formula ##STR1## or a pharmaceutically acceptable, water soluble salt thereof wherein R.sub.1 and R.sub.4 are each independently hydrogen, methyl or ethyl; one of R.sub.2 and R.sub.3 is alkyl of 1 to 4 carbons and the other is bromine or iodine; and n is 0, 1 or 2, are useful for the external imaging of the hepatobiliary system.
Inventor(s): Nunn; Adrian (Hopewell, NJ), Loberg; Michael (Princeton, NJ)
Assignee: E. R. Squibb & Sons, Inc. (Princeton, NJ)
Application Number:06/388,795
Patent Claim Types:
see list of patent claims
Compound; Composition;

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International Patent Family for Patent: 4,418,208

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria377975► Subscribe
Austria393357► Subscribe
AustriaA103384► Subscribe
AustriaA561381► Subscribe
Australia539726► Subscribe
Australia7880881► Subscribe
Belgium891534► Subscribe
Canada1187897► Subscribe
Switzerland649761► Subscribe
Germany3151686► Subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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