Zolpidem salt forms
Patent 6242460 Issued on June 5, 2001. Estimated Expiration Date: 
November 26, 2019. 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.
November 26, 2019. 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 ReferencesImidazo[1,2-a] pyridine derivatives and their application as pharmaceuticals Process for the preparation of imidazopyridines Patent #: 4794185 InventorsAssigneeApplicationNo. 09/449974 filed on 11/26/1999US Classes:514/300, Plural hetero atoms in the bicyclo ring system546/121, Ring nitrogen is shared by the two cyclos546/122The other cyclo in the bicyclo ring system is also six-membered (e.g., naphthyridines, etc.)ExaminersPrimary: Krass, FrederickAssistant: Jagoe, Donna Attorney, Agent or FirmInternational ClassesC07D 471/04 (20060101)C07D 471/00 (20060101) AbstractZolpidem salts having improved physical stability do not exhibit a melting endotherm corresponding to zolpidem free base when heated at 5° C./minute from about 25° C. to 250° C. The salts are generally easy to reproduce, even on an industrial scale and are easier to handle due to the increased stability than the known zolpidem tartrate. The zolpidem salts are typically pharmaceutically acceptable salts and can be used in formulating pharmaceutical compositions and in pharmaceutical uses; e.g. as a hypnotic.Other References
Field of SearchRing nitrogen is shared by the two cyclos |
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