Preparation of omeprazole and lansoprazole
Patent 5374730 Issued on December 20, 1994. Estimated Expiration Date: 
November 4, 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.
November 4, 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 ReferencesGastric acid secretion inhibiting substituted 2-(2-benzimidazolyl)-pyridines, pharmaceutical preparations containing same, and method for inhibiting gastric acid secretion 2-[2-pyridylmethylthio-(sulfinyl)]benzimidazoles Patent #: 4628098 InventorsAssigneeApplicationNo. 145572 filed on 11/04/1993US Classes:546/273.7Chalcogen bonded directly to a ring carbon of the 1,3-diazole ringExaminersPrimary: Fan, Jane T.Attorney, Agent or FirmInternational ClassC07D 401/12AbstractOmeprazole and lansoprazole, which are chemically pyridine-benzimidazole sulfinyl compounds, are produced from the corresponding acetamide-sulfide compounds by a process of oxidation to form the amide sulfinyl compound, followed by alkaline hydrolysis to the sulfinyl carboxylate or salt, and decarboxylation. |
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