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Details for Patent: 4,963,344

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Summary for Patent: 4,963,344

Title: Method to enhance NMR imaging using chelated paramagnetic ions
Abstract:Agents useful for influencing the relaxation times in NMR diagnostics, contain at least one paramagnetic, physiologically compatible complex salt comprising a chelate from an open-chain or cyclic complex-forming compound containing organic nitrogen, phosphorus, oxygen and/or sulfur, and a complexed ion of the lanthanide elements of atomic number 57-70 or of the transition metals of atomic numbers 21-29, 42 and 44, and, optionally, an inorganic or organic base or acid.
Inventor(s): Gries; Heinz (Berlin, DE), Rosenberg; Douwe (Berlin, DE), Weinmann; Hanns-Joachim (Berlin, DE), Speck; Ulrich (Berlin, DE), Mutzel; Wolfgang (Berlin, DE), Hayden; Georg-Alexander (Berlin, DE), Pfeiffer; Heinrich (Berlin, DE)
Assignee: Schering Aktiengesellschaft (Berlin and Bergkamen, DE)
Application Number:07/370,139
Patent Claim Types:
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Use; Composition;

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Foreign Priority and PCT Information for Patent: 4,963,344

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Germany3129906Jul 24, 1981
Germany3302410Jan 21, 1983
Germany3401057Jan 11, 1984

International Patent Family for Patent: 4,963,344

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria18719► subscribe
Austria397465► subscribe
Austria52247► 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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