Heterocyclic compounds and use
Patent 5328923 Issued on July 12, 1994. Estimated Expiration Date: 
August 13, 2011. 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.
August 13, 2011. 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 ReferencesPiperidine compounds and their preparation and use Piperidine compounds and their preparation and use Patent #: 5043345 InventorsAssigneeApplicationNo. 744150 filed on 08/13/1991US Classes:514/340, Ring nitrogen in the additional hetero ring (e.g., oxazole, etc.)514/342, Ring sulfur in the additional hetero ring546/268.7, Thiadiazoles (including hydrogenated)546/269.1Oxadiazoles (including hydrogenated)ExaminersPrimary: Fan, Jane T.Attorney, Agent or FirmForeign Patent References
International ClassesC07D 417/04A61K 031/44 Foreign Application Priority Data1990-08-21 DKAbstractThe present invention relates to therapeutically active azacyclic compounds, a method of preparing the same and to pharmaceutical compositions comprising the compounds. The novel compounds are useful as stimulants of the cognitive function of the forebrain and hippocampus of mammals and especially in the treatment of Alzheimer's disease, severe painful conditions and glaucoma.Other References
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