Azaquinoxalines and their use
Patent 5424311 Issued on June 13, 1995. Estimated Expiration Date: 
September 23, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 23, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesAmino derivatives of 1,2,3,4-tetrahydro-2-oxopyrido[2,2-b]-pyrazine carboxylic acids and esters Patent #: 4077955 InventorsAssigneeApplicationNo. 125163 filed on 09/23/1993US Classes:514/248, Polycyclo ring system having a 1,2- or 1,4-diazine as one of the cyclos544/350Three or more ring hetero atoms in the bicyclo ring systemExaminersPrimary: Shah, Mukund J.Assistant: Grumbling, Matthew V. Attorney, Agent or FirmForeign Patent References
International ClassesC07P 241/00A61K 031/495 Foreign Application Priority Data1992-09-26 DEAbstractCompounds of the formula I ##STR1## and their tautomeric form of the formula Ia ##STR2## in which the substituents R1 to R5 and V, W, Y and Z have the stated meanings, display an effect against viruses.Other References
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