Fluoride-containing Bioglass™ compositions
Patent 4775646 Issued on October 4, 1988. Estimated Expiration Date: 
September 10, 2006. 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 10, 2006. 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 3922155 Biocompatible glass ceramic material Bioglass coated A1203 ceramics Method of bonding a bioglass to metal Bioglass coated metal substrate Patent #: 4234972 InventorsAssigneeApplicationNo. 06/906619 filed on 09/10/1986US Classes:501/2, Devitrified glass-ceramics428/432, Next to metal or compound thereof501/1, CERAMIC COMPOSITIONS501/57, Fluorine606/76, Specialized coating or material623/23.61Bone compositionExaminersPrimary: Capella, StevenAttorney, Agent or FirmInternational ClassesC03C 4/00 (20060101)C03C 3/076 (20060101) C03C 3/097 (20060101) A61K 6/06 (20060101) A61K 6/02 (20060101) A61L 27/00 (20060101) A61L 27/32 (20060101) A61L 27/12 (20060101) A61F 2/00 (20060101) AbstractA fluoride-containing bioactive glass composition suitable for bulk implant prosthetic devices and coatings for prosthetic devices, the bioactive glass compositions selected from glass formulations containing, by mole 46.1% SiO2, 2.6% P2 O5, 26.9% CaO and 24.4% Na2 O and glass formulations containing, by mole, 52.1% SiO2, 23.8% CaO, 21.5% Na2 O, 2.6% P2 O5 wherein, respectively, 30 to 50 molar percent and 40 to 60 molar percent of the CaO is substituted with CaF2. These fluoride-containing bioactive glass materials demonstrate high resistance to demineralization in physiological fluids as well as extensive apatite formation which shows a predominance of crystalline apatite of mixed phase character.Other References
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