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Compositions: Ceramic > Ceramic Compositions > Glass Compositions, Compositions Containing Glass Other Than Those Wherein Glass Is A Bonding Agent, Or Glass Batch Forming Compositions > Silica Containing > Less Than 40 Percent By Weight Silica > And Boron > And Rare Earth (i.e., Elements With Atomic Number 39 Or 57-71) And Rare Earth (i.e., Elements With Atomic Number 39 Or 57-71)And Rare Earth (i.e., Elements With Atomic Number 39 Or 57-71) patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.03/01/07 - 20070049483 - Optical glass, precision press-molding preform, process for the production thereof, optical element and process for the production of the element Provided is a precision press-molding optical glass that is not easily degraded in quality by the occurrence of an altered layer such as fogging or yellowing on a surface and that comprises B2O3, ZnO, La2O3 and ZrO2 and contains, by mol %, 0 to less than 0.5% of Li2O, 20 ... 01/04/07 - 20070004581 - Optical glass and optical element The optical glass of the invention comprising: SiO2: 10 to 30%, B2O3: 15 to 35%, Li2O: 0 (inclusive) to 10%, Na2O: 0 (inclusive) to 5%, and K2O: 0 (inclusive) to 5% provided that Li2O+Na2O+K2O: 0 to 15%; MgO: 0 (inclusive) to 25%, CaO: 0 (inclusive) to 25%, BaO: 0 (inclusive) ... 11/02/06 - 20060247119 - Lead and arsenic free optical lanthanum borate glass In addition, they also may contain conventional refining agents. ... // - 30-45 - ... // - 0.5-15 - ... // - 18-34 - ... // - 10-26 - ... // - 10-25 - ... // - 0.5-8 - ... 10/19/06 - 20060234850 - Optical glass for precision press molding, preform for precission press molding, and process for the production thereof A high-refractivity high-dispersion optical glass for producing an optical element, which requires no machining, such as polishing or lapping, of an optical-function surface after precision press molding, containing B2O3, SiO2, La2O3, Gd2O3, ZnO, Li2O, ZrO2 and Ta2O5 as essential components, containing 0 to 1 mol % of Sb2O3 as an ... 10/12/06 - 20060229186 - Optical glass An optical glass having a refractive index (nd) and an Abbe number (νd) which are within an area surrounded by the straight lines which are drawn by connecting point A (nd=1.835, νd=46.5), point B (nd=1.90, νd=40.0), point C, (nd=1.90, νd=35.0) and point D (nd=1.835, νd=38.0) in a sequence of A, ... 08/24/06 - 20060189473 - Optical glass, glass gob for press-molding, optical part, process for producing glass shaped material and process for producing optical part An optical glass having a high light transmittance, a high refractive index and excellent production stability, which contains at least one of CaO and SrO together with SiO2, B2O3, La2O3, Nb2O5, TiO2 and BaO, having a composition that substantially contains, by weight %, 1 to 18% of SiO2, 3 to ... 05/18/06 - 20060105900 - Optical glass, precision press-molding preform, process for producing the preform, optical element and process for producing the element An optical glass having high refractivity and a low sag temperature and having a low-temperature softening property that enables precision press-molding is provided, and the optical glass contains, by mol %, 5 to 50% of B2O3, 3 to 50% of SiO2, 5 to 40% of TiO2, 1 to 40% of ... 05/11/06 - 20060100085 - Optical glass An optical glass has a low glass transition temperature (Tg) and optical constants in which a refractive index (nd) is in the range of from 1.70 to less than 1.74 and an Abbe number (νd) is between 40 and 45 (excluding 40 and 45), has a content of SiO2 is ... 04/13/06 - 20060079390 - Optical glass, preform for precision press-molding, process for the production of the preform, optical element, and process for the production of the element νd≧308.5−150×nd (in which 50≦νd≦59) (1) ... 09/22/05 - 20050209087 - Lead- and arsenic-free optical lanthanum flint glasses 0-5 ... // - 0.5-5 - ... // - 42-48 - ... // - 27-35 - ... // - 0.1-5.5 - ... 07/28/05 - 20050164864 - Optical glass, precision press-molding preform, process for production thereof, optical element and process for the production thereof νd>260−126×nd (1). ... ### FreshPatents.com Support |