Crystalline form of a cephalosporin antibiotic
Patent 5589593 Issued on December 31, 1996. Estimated Expiration Date: 
June 7, 2015. 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.
June 7, 2015. 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 References 3925372 Method for preparing crystalline cefadroxil monohydrate Process for preparing well crystallized alkali metal salts of 3, 7-substituted 7-aminocephalosporanic acid derivatives Crystalline cephem acid addition salts and process for their preparation Patent #: 5409918 InventorsApplicationNo. 483888 filed on 06/07/1995US Classes:540/220, Purification or recovery540/2151-thia-5-aza-bicyclo(4.2.0)octane (including unsaturated; e.g., cepham, etc.)ExaminersPrimary: Ford, John M.Assistant: Sripada, Pavanaram K. Attorney, Agent or FirmForeign Patent References
International ClassC07D 501/32Foreign Application Priority Data1991-11-11 ITAbstractThe preparation of a novel crystalline cefaclor and the conversion of such a product to cefaclor monohydrate are described. The new intermediate cefaclor is a particular crystalline form and possesses the same antibiotic properties as cefaclor monohydrate.Other References
|
| ||||||||||||||
