Bioglass coated A1203 ceramics
Patent 4103002 Issued on July 25, 1978. Estimated Expiration Date: 
February 8, 1997. 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.
February 8, 1997. 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 2866720 3900630 Three layer anti-reflection film Patent #: 3934961 InventorsAssigneeApplicationNo. 05/766749 filed on 02/08/1977US Classes:428/155, Crackled, crazed or slit427/190, Metallic compound particles427/257, Wrinkled or crackled coating427/269, Glass or ceramic base427/279, Vitreous coating427/398.1, Cooling428/426, Of quartz or glass428/428, Next to another silicon containing layer428/432Next to metal or compound thereofExaminersPrimary: Herbert, Thomas J. Jr.Assistant: Varndell, R. Eugene Jr. Attorney, Agent or FirmInternational ClassesA61L 27/00 (20060101)C04B 41/45 (20060101) C04B 41/86 (20060101) C04B 41/50 (20060101) C03C 4/00 (20060101) A61L 27/32 (20060101) A61F 2/00 (20060101) AbstractA method of coating a Al2 O3 ceramic surface with a biologically active glass comprising contacting a glass and ceramic having different thermal coefficients of expansion at a temperature sufficient to bond the glass to the ceramic surface by ion diffusion, cooling the coated substrate to a temperature sufficient to produce thermo-mechanical stress induced interconnected micro-cracks in the glass coating and overcoating said micro-cracked glass coating with at least one additional coating of biologically active glass. The invention includes a product of manufacture comprising a compacted Al2 O3 ceramic surface coated with at least two layers of biologically active glass characterized in that the first layer of glass has interconnected thermo-mechanical stress induced micro-cracks therein. | |
