Patents by Inventor Thomas P. Seward, III
Thomas P. Seward, III 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: 8534095Abstract: The invention is directed to a glass composition and articles made from the composition that are both polarizing and photorefractive. The glass has, for example, a composition consisting essentially of, in weight percent (“wt. %”) of 70-73 SiO2, 13-17% B2O3, 8-10% Na2O, 2-4% Al2O3, 0.005-0.1% CuO, <0.4% Cl, 0.1-0.5% Ag, 0.1-0.3% Br. In another embodiment the composition consists essentially of 70-77% SiO2, 13-18% B2O3, 8-10% Na2O, 2-4% Al2O3, 0.005-0.1% CuO, <0.4% Cl, 0.1-0.5% Ag, 0.1-0.3% Br. The glass can be used make articles or elements that can exhibits both the photorefractive effect and the polarizing effect within a single element or article, and can be used to make a variety of optical elements including Bragg gratings, filtering elements, and beam shaping elements and light collection elements for use in display, security, defense, metrology, imaging and communications applications.Type: GrantFiled: April 11, 2012Date of Patent: September 17, 2013Assignee: Corning IncorporatedInventors: Nicholas Francis Borrelli, Joseph Francis Schroeder, III, Thomas P. Seward, III
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Publication number: 20120192592Abstract: The invention is directed to a glass composition and articles made from the composition that are both polarizing and photorefractive. The glass has, for example, a composition consisting essentially of, in weight percent (“wt. %”) of 70-73 SiO2, 13-17% B2O3, 8-10% Na2O, 2-4% Al2O3, 0.005-0.1% CuO, <0.4% Cl, 0.1-0.5% Ag, 0.1-0.3% Br. In another embodiment the composition consists essentially of 70-77% SiO2, 13-18% B2O3, 8-10% Na2O, 2-4% Al2O3, 0.005-0.1% CuO, <0.4% Cl, 0.1-0.5% Ag, 0.1-0.3% Br. The glass can be used make articles or elements that can exhibits both the photorefractive effect and the polarizing effect within a single element or article, and can be used to make a variety of optical elements including Bragg gratings, filtering elements, and beam shaping elements and light collection elements for use in display, security, defense, metrology, imaging and communications applications.Type: ApplicationFiled: April 11, 2012Publication date: August 2, 2012Inventors: Nicholas Francis Borrelli, Joseph Francis Schroeder, III, Thomas P. Seward, III
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Patent number: 8179595Abstract: The invention is directed to a glass composition and articles made from the composition that are both polarizing and photorefractive. The glass has, for example, a composition consisting essentially of, in weight percent (“wt. %”) of 70-73 SiO2, 13-17% B2O3, 8-10% Na2O, 2-4% Al2O3, 0.005-0.1% CuO, <0.4% Cl, 0.1-0.5% Ag, 0.1-0.3% Br. In another embodiment the composition consists essentially of 70-77% SiO2, 13-18% B2O3, 8-10% Na2O, 2-4% Al2O3, 0.005-0.1% CuO, <0.4% Cl, 0.1-0.5% Ag, 0.1-0.3% Br. The glass can be used make articles or elements that can exhibits both the photorefractive effect and the polarizing effect within a single element or article, and can be used to make a variety of optical elements including Bragg gratings, filtering elements, and beam shaping elements and light collection elements for use in display, security, defense, metrology, imaging and communications applications.Type: GrantFiled: January 16, 2009Date of Patent: May 15, 2012Assignee: Corning IncorporatedInventors: Nicholas Francis Borrelli, Joseph Francis Schroeder, III, Thomas P. Seward, III
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Publication number: 20090190216Abstract: The invention is directed to a glass composition and articles made from the composition that are both polarizing and photorefractive. The glass has, for example, a composition consisting essentially of, in weight percent (“wt. %”) of 70-73 SiO2, 13-17% B2O3, 8-10% Na2O, 2-4% Al2O3, 0.005-0.1% CuO, <0.4% Cl, 0.1-0.5% Ag, 0.1-0.3% Br. In another embodiment the composition consists essentially of 70-77% SiO2, 13-18% B2O3, 8-10% Na2O, 2-4% Al2O3, 0.005-0.1% CuO, <0.4% Cl, 0.1-0.5% Ag, 0.1-0.3% Br. The glass can be used make articles or elements that can exhibits both the photorefractive effect and the polarizing effect within a single element or article, and can be used to make a variety of optical elements including Bragg gratings, filtering elements, and beam shaping elements and light collection elements for use in display, security, defense, metrology, imaging and communications applications.Type: ApplicationFiled: January 16, 2009Publication date: July 30, 2009Inventors: Nicholas Francis Borrelli, Joseph Francis Schroeder, III, Thomas P. Seward, III
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Publication number: 20090190215Abstract: The invention is directed to a glass composition and articles made from the composition that are both polarizing and photorefractive. The glass has, for example, a composition consisting essentially of, in weight percent (“wt. %”) of 70-73 SiO2, 13-17% B2O3, 8-10% Na2O, 2-4% Al2O3, 0.005-0.1% CuO, <0.4% Cl, 0.1-0.5% Ag, 0.1-0.3% Br. In another embodiment the composition consists essentially of 70-77% SiO2, 13-18% B2O3, 8-10% Na2O, 2-4% Al2O3, 0.005-0.1% CuO, <0.4% Cl, 0.1-0.5% Ag, 0.1-0.3% Br. The glass can be used make articles or elements that can exhibits both the photorefractive effect and the polarizing effect within a single element or article, and can be used to make a variety of optical elements including Bragg gratings, filtering elements, and beam shaping elements and light collection elements for use in display, security, defense, metrology, imaging and communications applications.Type: ApplicationFiled: December 18, 2008Publication date: July 30, 2009Inventors: Nicholas Francis Borrelli, Joseph Francis Schroeder, III, Thomas P. Seward, III
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Patent number: 6543254Abstract: The invention relates to fused silica having low compaction under high energy irradiation, particularly adaptable for use in photolithography applications.Type: GrantFiled: September 26, 2001Date of Patent: April 8, 2003Assignee: Corning IncorporatedInventors: Douglas C. Allan, Nicholas F. Borrelli, William R. Powell, Thomas P. Seward, III, Charlene M. Smith
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Patent number: 6494062Abstract: This invention relates to a method of rendering fused silica resistant to compaction caused by UV laser beam irradiation. The method of the invention results is a fused silica member that is desensitized to compaction caused by the long-term exposure to UV laser beams. The invention includes a means to pre-compact fused silica members using high energy radiation.Type: GrantFiled: January 31, 2001Date of Patent: December 17, 2002Assignee: Corning IncorporatedInventor: Thomas P. Seward, III
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Patent number: 6309991Abstract: Fused silica stepper lens for photolithographic application are disclosed which are resistant to laser-induced damage, specifically, compaction or densification which can lead to an increase in the optical path length of the lens. The figure compares the phase front distortions of a standard fused silica with the phase front distortions observed in two inventive stepper lens fused silica.Type: GrantFiled: February 25, 1999Date of Patent: October 30, 2001Assignee: Corning IncorporatedInventors: Nicholas F. Borrelli, Thomas P. Seward, III, Charlene Smith
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Patent number: 6295841Abstract: A fused silica glass which exhibits low compaction when exposed to high intensity excimer radiation, also exhibits low optical path distortion after exposure to a high intensity radiation dose. Also disclosed is a method for improving the select ratio of fused silica glass for photolithography, by predicting the optical path distortion of the glass under use by determining the intrinsic densification of the glass at a given number of pulses and fluence per pulse. Mathematical modeling methods are also disclosed for use in producing a fused silica stepper lens having low compaction under high intensity excimer radiation; and for determining optical path distortion caused by high energy radiation in fused silica glass.Type: GrantFiled: February 25, 1999Date of Patent: October 2, 2001Assignee: Corning IncorporatedInventors: Douglas C. Allan, William R. Powell, Nicholas F. Borrelli, Thomas P. Seward, III, Charlene M. Smith
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Patent number: 6205818Abstract: A method of rendering fused silica resistant to compaction caused by UV laser beam irradiation. The method of the invention results in a fused silica member that is desensitized to compaction caused by the long-term exposure to UV laser beams. The invention includes a means to pre-compact fused silica members using high energy radiation.Type: GrantFiled: December 14, 1998Date of Patent: March 27, 2001Assignee: Corning IncorporatedInventor: Thomas P. Seward, III
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Patent number: 5375012Abstract: A birefringent waveplate is composed of an integral, transparent, glass body having a thermally developed dispersed phase therein composed of particles having a high aspect ratio and being oriented and aligned in one direction, whereby the glass body is rendered birefringent so that polarized components of light transmitted through the glass body have a phase shift introduced.Type: GrantFiled: October 13, 1992Date of Patent: December 20, 1994Assignee: Corning IncorporatedInventors: Nicholas F. Borrelli, Thomas P. Seward, III
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Patent number: 4486213Abstract: A method is set forth for making polarizing glasses having high dichroic ratios by drawing relatively small silver-containing particles under relatively high stress and elongating such particles during the drawing process without rupturing the glass draw by coating the polarizing glass with a substantially low viscosity skin glass.Type: GrantFiled: September 29, 1982Date of Patent: December 4, 1984Assignee: Corning Glass WorksInventors: William P. Lentz, Thomas P. Seward, III, George C. Shay
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Patent number: 4479819Abstract: The instant invention is directed to the preparation of glass articles exhibiting excellent polarization in the infrared portion of the spectrum from glasses characterized as containing silver halide particles therein selected from the group of AgCl, AgBr, AgI. The inventive method comprises four general steps:(a) a batch for a glass containing silver and at least one halide selected from the group of chloride, bromide, and iodide is melted and the melt shaped into a glass body of a desired geometry;(b) the glass body is subjected to a heat treatment at least above the strain point but not in excess of 50.degree. C. above the softening point of the glass for a period of time adequate to cause the generation of AgCl and/or AgBr and/or AgI particles therein, said particles ranging in size between 200-5000 .ANG.;(c) the glass body is elongated under stress at temperatures above the annealing point, but below that where said glass exhibits a viscosity of about 10.sup.Type: GrantFiled: September 29, 1982Date of Patent: October 30, 1984Assignee: Corning Glass WorksInventors: Nicholas F. Borelli, Frank Coppola, David L. Morse, Daniel A. Nolan, Thomas P. Seward, III
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Patent number: 4282021Abstract: The instant invention is related to the manufacture of photochromic glasses having base compositions within a very narrow interval of the alkali metal boroaluminosilicate system wherein silver chloride and/or silver bromide crystals impart photochromic properties. The glasses are notable for their rapid fading characteristics and relatively low temperature dependence of darkening. The compositions are especially suitable for a production process which contemplates simultaneously shaping articles from glass sheet and developing photochromic properties therein.Type: GrantFiled: October 26, 1979Date of Patent: August 4, 1981Assignee: Corning Glass WorksInventors: Jean P. Mazeau, Thomas P. Seward, III
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Patent number: 4222781Abstract: Silver-free, cadmium-free, copper halide-based alkali aluminoborosilicate glasses exhibiting good optical clarity and good photochromic darkening and fading are provided by controlling the alkali, Al.sub.2 O.sub.3 and B.sub.2 O.sub.3 concentrations in the base glass and/or adding MoO.sub.3 or WO.sub.3 thereto.Type: GrantFiled: August 16, 1979Date of Patent: September 16, 1980Assignee: Corning Glass WorksInventors: David L. Morse, Thomas P. Seward, III
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Patent number: 4210386Abstract: A fluorine containing silicate glass substrate is heated to a temperature sufficiently high to permit fluorine to out-diffuse from the surface thereof. A surface region is formed having a gradient fluorine concentration in a direction perpendicular to the substrate surface, the region of lowest fluorine concentration having the highest refractive index. The resultant device is capable of functioning as an optical waveguide.Type: GrantFiled: June 1, 1976Date of Patent: July 1, 1980Assignee: Corning Glass WorksInventors: Roger J. Araujo, Nicholas F. Borrelli, John D. Crow, Thomas P. Seward, III
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Patent number: 4190451Abstract: The instant invention is concerned with transparent photochromic glass compositions which not only exhibit desirably rapid darkening and fading characteristics, but which also demonstrate the other physical and optical properties required for use in ophthalmic applications. Such glasses utilize the presence of silver chloride and/or silver bromide crystals to impart photochromic behavior in a narrowly-defined composition range within the alkali metal aluminoborosilicate base system. Copper ions are also included in the composition to perform as a sensitizing agent. The glasses have the capability of being either thermally tempered or chemically strengthened to comply with the United States Food and Drug Administration regulations for lenses used in ophthalmic applications. Improved independence of temperature effects upon the photochromic properties can be achieved where the copper level, expressed as CuO, is maintained between about 0.004-0.Type: GrantFiled: February 28, 1979Date of Patent: February 26, 1980Assignee: Corning Glass WorksInventors: George B. Hares, David L. Morse, Thomas P. Seward, III, Dennis W. Smith
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Patent number: 4160655Abstract: A process for the production of a gradient photochromic glass article comprising the selective over-nucleation of a limited portion of the article followed by a photochromic development heat treatment of the entire article, and the product of this process, are described.Type: GrantFiled: December 19, 1977Date of Patent: July 10, 1979Assignee: Corning Glass WorksInventors: Paul I. Kingsbury, Jr., Thomas P. Seward, III
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Patent number: 4148661Abstract: Chemically-strengthenable silver halide-containing lithium boroaluminosilicate glass compositions having physical and chemical characteristics required for sheet drawing processes and exhibiting excellent photochromic properties after heat treatment, and also strengthened photochromic drawn sheet glass articles provided therefrom, are described.Type: GrantFiled: November 4, 1976Date of Patent: April 10, 1979Assignee: Corning Glass WorksInventors: David J. Kerko, Thomas P. Seward, III
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Patent number: 4130437Abstract: The instant invention is related to the manufacture of photochromic glasses having base compositions within a very narrow interval of the alkali metal boroaluminosilicate system wherein silver chloride and/or silver bromide crystals impart photochromic properties. The glasses are notable for their rapid fading characteristics and relatively low temperature dependence of darkening. The compositions are especially suitable for a production process which contemplates simultaneously shaping articles from glass sheet and developing photochromic properties therein.Type: GrantFiled: April 12, 1978Date of Patent: December 19, 1978Assignee: Corning Glass WorksInventors: Jean P. Mazeau, Thomas P. Seward, III