Patents by Inventor Ronald Leroy Stewart
Ronald Leroy Stewart has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11926564Abstract: Glasses that can be chemically strengthened and are colored by transition metals. Most of the glasses are black, with some having high damage resistance and compressive surface layers having high compressive stress and depth of layer after ion exchange. These colored glasses do not require a post-forming heat treatment to produce color and are formable by fusions drawing, rolling, slot drawing, and float glass processes.Type: GrantFiled: January 28, 2014Date of Patent: March 12, 2024Assignee: CORNING INCORPORATEDInventors: Xiaoju Guo, Jeffrey Todd Kohli, John Christopher Mauro, Ronald Leroy Stewart
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Publication number: 20230061747Abstract: Embodiments are directed to glass articles which are resistant to UV photodarkening, the glass articles having a thickness ?1.3 mm and comprise UV absorbers such as Ti, V, Mn, Fe, Cu, Ce, Ge, Mo, Cr, Co and Ni, and combinations thereof, or alternatively comprising ZnO or SnO2.Type: ApplicationFiled: October 27, 2022Publication date: March 2, 2023Inventors: Dana Craig Bookbinder, Nicholas Francis Borrelli, Matthew John Dejneka, Timothy Michael Gross, Xiaoju Guo, Ronald Leroy Stewart
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Patent number: 11498865Abstract: Embodiments are directed to glass articles which are resistant to UV photodarkening, the glass articles having a thickness ?1.3 mm and comprise UV absorbers such as Ti, V, Mn, Fe, Cu, Ce, Ge, Mo, Cr, Co and Ni, and combinations thereof, or alternatively comprising ZnO or SnO2.Type: GrantFiled: November 13, 2019Date of Patent: November 15, 2022Assignee: CORNING INCORPORATEDInventors: Dana Craig Bookbinder, Nicholas Francis Borrelli, Matthew John Dejneka, Timothy Michael Gross, Xiaoju Guo, Ronald Leroy Stewart
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Patent number: 10676389Abstract: A glass article includes an alkali-alkaline-alumino-silicate composition, wherein the glass article has a coefficient of thermal expansion (CTE) in a range from about 110×10?7/° C. to about 130×10?7/° C. over a temperature range of 0-300° C.Type: GrantFiled: September 29, 2016Date of Patent: June 9, 2020Assignee: Corning IncorporatedInventors: Jeffrey Todd Kohli, Ronald Leroy Stewart
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Publication number: 20200079682Abstract: Embodiments are directed to glass articles which are resistant to UV photodarkening, the glass articles having a thickness ?1.3 mm and comprise UV absorbers such as Ti, V, Mn, Fe, Cu, Ce, Ge, Mo, Cr, Co and Ni, and combinations thereof, or alternatively comprising ZnO or SnO2.Type: ApplicationFiled: November 13, 2019Publication date: March 12, 2020Inventors: Dana Craig Bookbinder, Nicholas Francis Borrelli, Matthew John Dejneka, Timothy Michael Gross, Xiaoju Guo, Ronald Leroy Stewart
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Patent number: 10501365Abstract: Embodiments are directed to glass articles which are resistant to UV photodarkening, the glass articles having a thickness ?1.3 mm and comprise UV absorbers such as Ti, V, Mn, Fe, Cu, Ce, Ge, Mo, Cr, Co and Ni, and combinations thereof, or alternatively comprising ZnO or SnO2.Type: GrantFiled: September 25, 2015Date of Patent: December 10, 2019Assignee: CORNING INCORPORATEDInventors: Dana Craig Bookbinder, Nicholas Francis Borrelli, Matthew John Dejneka, Timothy Michael Gross, Xiaoju Guo, Ronald Leroy Stewart
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Publication number: 20190039942Abstract: A glass article includes an alkali-alkaline-alumino-silicate composition, wherein the glass article has a coefficient of thermal expansion (CTE) in a range from about 110×10?7/° C. to about 130×10?7/° C. over a temperature range of 0-300° C.Type: ApplicationFiled: September 29, 2016Publication date: February 7, 2019Applicant: Corning IncorporatedInventors: Jeffrey Todd KOHLI, Ronald Leroy STEWART
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Patent number: 9868663Abstract: A glass ceramic precursor glass and a glass ceramic having low levels of rhodium and a method of controlling the amount of rhodium in such glasses and glass ceramics. The precursor glass and glass ceramic contain from about 1 ppm to about 10 ppm and, in certain embodiments, from about 1 ppm to about 6 ppm rhodium. The method of controlling of reducing rhodium dissolution from a rhodium-containing material such as, for example, an alloy into a glass melt comprises controlling and/or lowering the partial pressure of oxygen at the rhodium-containing vessel/glass interface by imposing a high humidity condition around the external (non-glass-contact) surface of the rhodium-containing material. The lower concentration of rhodium minimizes its coloring effect on the white color of the glass ceramic.Type: GrantFiled: July 1, 2016Date of Patent: January 16, 2018Assignee: CORNING INCORPORATEDInventors: Samir Biswas, Qiang Fu, David Myron Lineman, Ronald Leroy Stewart
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Publication number: 20160368812Abstract: A strengthened glass article having a central tension that is below a threshold value above which the glass exhibits frangible behavior. The central tension varies non-linearly with the thickness of the glass. The glass article may be used as cover plates or windows for portable or mobile electronic devices such as cellular phones, music players, information terminal (IT) devices, including laptop computers, and the like.Type: ApplicationFiled: July 20, 2016Publication date: December 22, 2016Applicant: Corning IncorporatedInventors: Kristen L. Barefoot, James Joseph Price, Jose Mario Quintal, Ronald Leroy Stewart
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Patent number: 9499431Abstract: A strengthened glass article having a central tension that is below a threshold value above which the glass exhibits frangible behavior. The central tension varies non-linearly with the thickness of the glass. The glass article may be used as cover plates or windows for portable or mobile electronic devices such as cellular phones, music players, information terminal (IT) devices, including laptop computers, and the like.Type: GrantFiled: March 14, 2013Date of Patent: November 22, 2016Assignee: Corning IncorporatedInventors: Kristen L Barefoot, David John Brockway, James Joseph Price, Jose Mario Quintal, Ronald Leroy Stewart
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Publication number: 20160311718Abstract: A glass ceramic precursor glass and a glass ceramic having low levels of rhodium and a method of controlling the amount of rhodium in such glasses and glass ceramics. The precursor glass and glass ceramic contain from about 1 ppm to about 10 ppm and, in certain embodiments, from about 1 ppm to about 6 ppm rhodium. The method of controlling of reducing rhodium dissolution from a rhodium-containing material such as, for example, an alloy into a glass melt comprises controlling and/or lowering the partial pressure of oxygen at the rhodium-containing vessel/glass interface by imposing a high humidity condition around the external (non-glass-contact) surface of the rhodium-containing material. The lower concentration of rhodium minimizes its coloring effect on the white color of the glass ceramic.Type: ApplicationFiled: July 1, 2016Publication date: October 27, 2016Inventors: Samir Biswas, Qiang Fu, David Myron Lineman, Ronald Leroy Stewart
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Patent number: 9403715Abstract: A glass ceramic precursor glass and a glass ceramic having low levels of rhodium and a method of controlling the amount of rhodium in such glasses and glass ceramics. The precursor glass and glass ceramic contain from about 1 ppm to about 10 ppm and, in certain embodiments, from about 1 ppm to about 6 ppm rhodium. The method of controlling of reducing rhodium dissolution from a rhodium-containing material such as, for example, an alloy into a glass melt comprises controlling and/or lowering the partial pressure of oxygen at the rhodium-containing vessel/glass interface by imposing a high humidity condition around the external (non-glass-contact) surface of the rhodium-containing material. The lower concentration of rhodium minimizes its coloring effect on the white color of the glass ceramic.Type: GrantFiled: May 23, 2014Date of Patent: August 2, 2016Assignee: CORNING INCORPORATEDInventors: Samir Biswas, Qiang Fu, David Myron Lineman, Ronald Leroy Stewart
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Publication number: 20160090321Abstract: Embodiments are directed to glass articles which are resistant to UV photodarkening, the glass articles having a thickness ?1.3 mm and comprise UV absorbers such as Ti, V, Mn, Fe, Cu, Ce, Ge, Mo, Cr, Co and Ni, and combinations thereof, or alternatively comprising ZnO or SnO2.Type: ApplicationFiled: September 25, 2015Publication date: March 31, 2016Inventors: Dana Craig Bookbinder, Nicholas Francis Borrelli, Matthew John Dejneka, Timothy Michael Gross, Xiaoju Guo, Ronald Leroy Stewart
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Publication number: 20150368149Abstract: Glasses that can be chemically strengthened and are colored by transition metals. Most of the glasses are black, with some having high damage resistance and compressive surface layers having high compressive stress and depth of layer after ion exchange. These colored glasses do not require a post-forming heat treatment to produce color and are formable by fusions drawing, rolling, slot drawing, and float glass processes.Type: ApplicationFiled: January 28, 2014Publication date: December 24, 2015Inventors: Xiaoju Guo, Jeffrey Todd Kohli, John Christopher Mauro, Ronald LeRoy Stewart
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Patent number: 9133054Abstract: Crystallizable glasses, glass-ceramics, IXable glass-ceramics, and IX glass-ceramics are disclosed. The glass-ceramics exhibit ?-spodumene ss as the predominant crystalline phase. These glasses and glass-ceramics, in mole %, include: 62-75 SiO2; 10.5-17 Al2O3; 5-13 Li2O; 0-4 ZnO; 0-8 MgO; 2-5 TiO2; 0-4 B2O3; 0-5 Na2O; 0-4 K2O; 0-2 ZrO2; 0-7 P2O5; 0-0.3 Fe2O3; 0-2 MnOx; and 0.05-0.2 SnO2. Additionally, these glasses and glass-ceramics exhibit the following criteria: a. a ratio: [ Li 2 ? O + Na 2 ? O + K 2 ? O + MgO + ZnO ] [ Al 2 ? O 3 + B 2 ? O 3 ] ?between 0.7 to 1.5; b. a ? ? ratio ? : ? [ TiO 2 + SnO 2 ] [ SiO 2 + B 2 ? O 3 ] ?greater than 0.04. Furthermore, the glass-ceramics exhibit an opacity ?about 85% over the wavelength range of 400-700 nm for an about 0.Type: GrantFiled: October 31, 2013Date of Patent: September 15, 2015Assignee: Corning IncorporatedInventors: George Halsey Beall, Marie Jacqueline Monique Comte, George Owen Dale, Linda Ruth Pinckney, Charlene Marie Smith, Ronald Leroy Stewart, Steven Alvin Tietje
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Publication number: 20150183680Abstract: A strengthened glass article having a central tension that is below a threshold value above which the glass exhibits frangible behavior. The central tension varies non-linearly with the thickness of the glass. The glass article may be used as cover plates or windows for portable or mobile electronic devices such as cellular phones, music players, information terminal (IT) devices, including laptop computers, and the like.Type: ApplicationFiled: March 14, 2013Publication date: July 2, 2015Applicant: Corning IncorporatedInventors: Kristen L. Barefoot, David John Brockway, James Joseph Price, Jose Mario Quintal, Ronald Leroy Stewart
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Publication number: 20140356628Abstract: A glass ceramic precursor glass and a glass ceramic having low levels of rhodium and a method of controlling the amount of rhodium in such glasses and glass ceramics. The precursor glass and glass ceramic contain from about 1 ppm to about 10 ppm and, in certain embodiments, from about 1 ppm to about 6 ppm rhodium. The method of controlling of reducing rhodium dissolution from a rhodium-containing material such as, for example, an alloy into a glass melt comprises controlling and/or lowering the partial pressure of oxygen at the rhodium-containing vessel/glass interface by imposing a high humidity condition around the external (non-glass-contact) surface of the rhodium-containing material. The lower concentration of rhodium minimizes its coloring effect on the white color of the glass ceramic.Type: ApplicationFiled: May 23, 2014Publication date: December 4, 2014Applicant: Corning IncorporatedInventors: Samir Biswas, Qiang Fu, David Myron Lineman, Ronald Leroy Stewart
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Patent number: 8664130Abstract: Crystallizable glasses, glass-ceramics, IXable glass-ceramics, and IX glass-ceramics are disclosed. The glass-ceramics exhibit ?-spodumene ss as the predominant crystalline phase. These glasses and glass-ceramics, in mole %, include: 62-75 Si O2; 10.5-17 Al2O3; 5-13 Li2O; 0-4 ZnO; 0-8 MgO; 2-5 TiO2; 0-4 B2O3; 0-5 Na2O; 0-4 K2O; 0-2 ZrO2; 0-7 P2O5; 0-0.3 Fe2O3; 0-2 MnOx; and 0.05-0.2 SnO2. Additionally, these glasses and glass-ceramics exhibit the following criteria: a. a ratio: [ Li 2 ? O + Na 2 ? O + K 2 ? O + MgO + ZnO ] [ Al 2 ? O 3 + B 2 ? O 3 ] between 0.7 to 1.5; b. a ratio: [ TiO 2 + SnO 2 ] [ SiO 2 + B 2 ? O 3 ] greater than 0.04. Furthermore, the glass-ceramics exhibit an opacity ?about 85% over the wavelength range of 400-700 nm for an about 0.Type: GrantFiled: March 15, 2013Date of Patent: March 4, 2014Assignee: Corning IncorporatedInventors: George Halsey Beall, Marie Jacqueline Monique Comte, George Owen Dale, Linda Ruth Pinckney, Charlene Marie Smith, Ronald Leroy Stewart, Steven Alvin Tietje
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Patent number: 8664131Abstract: Crystallizable glasses, glass-ceramics, IXable glass-ceramics, and IX glass-ceramics are disclosed. The glass-ceramics exhibit ?-spodumene ss as the predominant crystalline phase. These glasses and glass-ceramics, in mole %, include: 62-75 SiO2; 10.5-17 Al2O3; 5-13 Li3O; 0-4 ZnO; 0-8 MgO; 2-5 TiO2; 0-4 B2O3; 0-5 Na2O; 0-4 K2O; 0-2 ZrO2; 0-7 P2O5; 0-0.3 Fe2O3; 0-2 MnOx; and 0.05-0.2 SnO2. Additionally, these glasses and glass-ceramics exhibit the following criteria: a. a ratio: [ Li 2 ? O + Na 2 ? O + K 2 ? O + MgO + ZnO _ ] ? [ Al 2 ? O 3 + B 2 ? O 3 ] between 0.7 to 1.5; b. a ratio: [ TiO 2 + SnO 2 _ ] ? [ SiO 2 + B 2 ? O 3 ] greater than 0.04. Furthermore, the glass-ceramics exhibit an opacity ?about 85% over the wavelength range of 400-700 nm for an about 0.Type: GrantFiled: July 2, 2013Date of Patent: March 4, 2014Assignee: Corning IncorporatedInventors: George Halsey Beall, Marie Jacqueline Monique Comte, George Owen Dale, Linda Ruth Pinckney, Charlene Marie Smith, Ronald Leroy Stewart, Steven Alvin Tietje
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Publication number: 20140057092Abstract: Crystallizable glasses, glass-ceramics, IXable glass-ceramics, and IX glass-ceramics are disclosed. The glass-ceramics exhibit ?-spodumene ss as the predominant crystalline phase. These glasses and glass-ceramics, in mole %, include: 62-75 SiO2; 10.5-17 Al2O3; 5-13 Li2O; 0-4 ZnO; 0-8 MgO; 2-5 TiO2; 0-4 B2O3; 0-5 Na2O; 0-4 K2O; 0-2 ZrO2; 0-7 P2O5; 0-0.3 Fe2O3; 0-2 MnOx; and 0.05-0.2 SnO2. Additionally, these glasses and glass-ceramics exhibit the following criteria: a. a ratio: [ Li 2 ? O + Na 2 ? O + K 2 ? O + MgO + ZnO ] [ Al 2 ? O 3 + B 2 ? O 3 ] between 0.7 to 1.5; b. a ? ? ratio ? : ? [ TiO 2 + SnO 2 ] [ SiO 2 + B 2 ? O 3 ] greater than 0.04. Furthermore, the glass-ceramics exhibit an opacity ?about 85% over the wavelength range of 400-700 nm for an about 0.Type: ApplicationFiled: October 31, 2013Publication date: February 27, 2014Applicant: CORNING INCORPORATEDInventors: George Halsey Beall, Marie Jacqueline Monique Comte, George Owen Dale, Linda Ruth Pinckney, Charlene Marie Smith, Ronald Leroy Stewart, Steven Alvin Tietje