Patents by Inventor David J. Kerko
David J. Kerko 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: 6811727Abstract: Disclosed is a photochromic plastic ophthalmic lenses having polymer matrices with an effective amount of at least one photochromic agent distributed therein, applied thereto or associated therewith and at least one ophthalmic filtering dye applied thereto, associated therewith or distributed therein the lens. A group of the filter lenses have dominant wavelengthes between 570 and 605 nm and color purity between 50% and 75%. Another lens product of the present invention is particularly suitable for patients suffering from retinitis pigmentosa. The lenses of the present invention are particularly suitable for individuals bothered by strong or variable illumination intensity.Type: GrantFiled: January 9, 2002Date of Patent: November 2, 2004Assignee: Corning IncorporatedInventors: Thomas G. Havens, David J. Kerko, Brent M. Wedding
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Publication number: 20030164481Abstract: Disclosed is a photochromic plastic ophthalmic lenses having polymer matrices with an effective amount of at least one photochromic agent distributed therein, applied thereto or associated therewith and at least one ophthalmic filtering dye applied thereto, associated therewith or distributed therein the lens. A group of the filter lenses have dominant wavelengthes between 570 and 605 nm and color purity between 50% and 75%. Another lens product of the present invention is particularly suitable for patients suffering from retinitis pigmentosa. The lenses of the present invention are particularly suitable for individuals bothered by strong or variable illumination intensity.Type: ApplicationFiled: January 9, 2002Publication date: September 4, 2003Inventors: Thomas G. Havens, David J. Kerko, Brent M. Wedding
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Patent number: 6606885Abstract: A glass polarizer and a method of making the polarizer, the polarizer being produced from an R2O—Al2O3—B2O3—SiO2 glass containing limited amounts of ZrO2 and TiO2, and having a silver halide liquidus temperature and a rutile liquidus temperature, both temperatures being not over 995° C.Type: GrantFiled: October 9, 2001Date of Patent: August 19, 2003Assignee: Corning IncorporatedInventors: Michael D. Harris, Thomas G. Havens, William E. Horsfall, David J. Kerko
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Publication number: 20030066310Abstract: A glass polarizer and a method of making the polarizer, the polarizer being produced from an R2O—Al2O3—B2O3—SiO2 glass containing limited amounts of ZrO2 and TiO2, and having a silver halide liquidus temperature and a rutile liquidus temperature, both temperatures being not over 995° C.Type: ApplicationFiled: October 9, 2001Publication date: April 10, 2003Inventors: Michael D. Harris, Thomas G. Havens, William E. Horsfall, David J. Kerko
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Patent number: 6363748Abstract: An ophthalmic, protective, filter lens, and a method of producing such lens, the lens having a ratio of Z and Y tristimulus values between 0.25-0.40, a dominant wavelength between 570-580 nm. on a color mixture diagram, a sharp transmission drop between 450-500 nm. and a transmission not over 30% between 400-450 nm. The lens is produced by firing a silver halide-containing, photochromic glass lens in a hydrogen-containing atmosphere within a temperature range of 465° C. to 495° C. for less than 20 minutes.Type: GrantFiled: November 16, 2000Date of Patent: April 2, 2002Assignee: Corning SAInventors: Thomas G. Havens, David J. Kerko, Brent M. Wedding
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Patent number: 6197711Abstract: An ophthalmic, protective, filter lens, and a method of producing such lens, the lens having a ratio of Z and Y tristimulus values between 0.25-0.40, a dominant wavelength between 570-580 nm. on a color mixture diagram, a sharp transmission drop between 450-500 nm. and a transmission not over 30% between 400-450 nm.Type: GrantFiled: April 26, 1999Date of Patent: March 6, 2001Assignee: Corning S.A.Inventors: Thomas G. Havens, David J. Kerko, Brent M. Wedding
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Patent number: 6177371Abstract: A fixed tint, photochromic glasses and sunglass lenses produced therefrom. The glasses have R2O—Al2O3—B2O3—SiO2 base compositions, contain silver chloride and bromide contents as photochromic constituents and 0.27-0.38% and 0.035-0.060%, both by weight percent, as glass colorants, the NiO:Co3O4 ratio being at least 6:1.Type: GrantFiled: April 9, 1999Date of Patent: January 23, 2001Assignee: Corning S.A.Inventors: Thomas G. Havens, David J. Kerko, Brent M. Wedding
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Patent number: 6165922Abstract: A fixed tint, photochromic glasses and sunglass lenses produced therefrom. The glasses have R.sub.2 O--Al.sub.2 O.sub.3 --B.sub.2 O.sub.3 --SiO.sub.2 base compositions, contain silver chloride and bromide contents as photochromic constituents and 0.22-0.38% NiO and 0.034-0.060% CoO, both by weight percent, as glass colorants, the NiO:CoO ratio being in the range of 5.5-7.2:1.Type: GrantFiled: September 8, 1999Date of Patent: December 26, 2000Assignee: Corning S.A.Inventors: Thomas G. Havens, David J. Kerko, Brent M. Wedding
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Patent number: 6037283Abstract: A photochromic glass lens and method of producing such lens, the lens having a plus power and a composition consisting essentially of:______________________________________ SiO.sub.2 54-58% Ag 0.20-0.33% B.sub.2 O.sub.3 18-22% Cl 0.30-0.50% Al.sub.2 O.sub.3 7-8% Br 0.04-0.14% Li.sub.2 O 3.75-4.5% CuO 0.007-0.012% Na.sub.2 O 0-1% PbO 0-0.08% TiO.sub.2 0-2% Sb.sub.2 O.sub.3 0-0.20% ZrO.sub.2 2-4.5% K.sub.2 O 5.5-7.5% ______________________________________and wherein the mole ratio of Li.sub.2 O:Na.sub.2 O is =>9:1.Type: GrantFiled: August 18, 1998Date of Patent: March 14, 2000Assignee: Corning IncorporatedInventors: Thomas G. Havens, David J. Kerko
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Patent number: 5973865Abstract: An ophthalmic filter material having a photopic transmittance (Y.sub.P) higher than the scotopic transmittance (Y.sub.S), the ratio of Y.sub.P :Y.sub.S being in the range of 2.0-4.0, a dominant wavelength within the ranges of 580-605 nm and a color purity of 60-75% whereby colors perceived through the material approximate those of the scene being viewed. A method of producing such a filter material which comprises heating a photochromic glass lens in a reducing atmosphere for a time and at a temperature that is sufficient to impart the recited characteristics to the glass surface and that is equivalent to a flowing hydrogen atmosphere, or immersing a tintable plastic solution in a dye solution for a time sufficient to impart the recited characteristics.Type: GrantFiled: September 29, 1998Date of Patent: October 26, 1999Assignee: Corning IncorporatedInventors: Thomas G. Havens, David J. Kerko, Brent M. Wedding
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Method of altering the visible absorption characteristics of permanently tinted photochromic glasses
Patent number: 5728189Abstract: A photochromic glass having colorant incorporated in the glass composition to impart a permanent tint, and having its chromaticity point shifted from the blue-green side toward the red side of the white point in the CIE chromaticity coordinate system, and a method of producing such article by heating the article for a sufficient time, and at a sufficient temperature, in a dilute, hydrogen-containing atmosphere to so move the chromaticity point.Type: GrantFiled: February 13, 1997Date of Patent: March 17, 1998Assignee: Corning IncorporatedInventors: David J. Kerko, Brent M. Wedding -
Patent number: 5729381Abstract: This invention is directed to the production of cuprous halide- or a cuprous-cadmium halide-containing glass articles which are essentially completely opaque to ultraviolet radiation and can be essentially completely opaque to radiation within the region of wavelengths of up to 550 nm, but are transparent to visible radiations having a wavelength longer than the radiation within the region of opacity. The method involves exposing the glass articles to a hydrogen gas-containing atmosphere at a temperature between about 375.degree.-500.degree. C. for a period of at least 18 hours to develop an integral reduced layer in at least one surface of the article having a depth effective to prevent the transmission of ultraviolet radiation and radiation having a wavelength up to 550 nm through the article.Type: GrantFiled: November 13, 1995Date of Patent: March 17, 1998Assignee: Corning IncorporatedInventors: Thomas G. Havens, David J. Kerko, JoAnn Morrell
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Patent number: 5639701Abstract: A photochromic glass having colorant incorporated in the glass composition to impart a permanent tint, and having its chromaticity point shifted from the blue-green side toward the red side of the white point in the CIE chromaticity coordinate system, and a method of producing such article by heating the article for a sufficient time, and at a sufficient temperature, in a dilute, hydrogen-containing atmosphere to so move the chromaticity point.Type: GrantFiled: January 9, 1996Date of Patent: June 17, 1997Assignee: Corning IncorporatedInventors: David J. Kerko, Brent M. Wedding
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Patent number: 5627114Abstract: This invention is directed to the production of glass articles transparent to visible radiation, but opaque to ultraviolet radiation, rendering them particularly suitable for protecting the wearer of such lenses from exposure to laser radiation in the ultraviolet regions of the electromagnetic spectrum. The method involves exposing silver halide-containing glass articles to flowing hydrogen in a heat chamber operating at 375.degree.-500.degree. C. for at least four hours to produce an integral reduced layer in at least one surface of the articles of sufficient depth to prevent the transmission of ultraviolet radiation through the articles.Type: GrantFiled: November 27, 1995Date of Patent: May 6, 1997Assignee: Corning IncorporatedInventors: Thomas G. Havens, David J. Kerko, JoAnn Morrell
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Patent number: 5607493Abstract: This invention is directed to the production of a silver halide-containing glass article essentially free from silver halide crystals exhibiting a bright yellow coloration which strongly attenuates the transmission of ultraviolet radiation and radiation having a wavelength up to about 450 nm, said article having an integral reduced surface layer thereon, the depth of that layer being sufficient to effectively prevent the transmission therethrough of ultraviolet radiation and radiation having a wavelength up to about 450 nm.Type: GrantFiled: November 6, 1995Date of Patent: March 4, 1997Assignee: Corning IncorporatedInventors: David J. Kerko, Brent M. Wedding
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Patent number: 5540745Abstract: Cuprous halide- or a cuprous-cadmium halide-containing glass articles are produced which are essentially completely opaque to ultraviolet radiation and can De essentially completely opaque to radiation within the region of wavelengths of up to 550 nm, but are transparent to visible radiations having a wavelength longer than the radiation within the region of opacity. The method involves exposing the glass articles to a hydrogen gas-containing atmosphere at a temperature between about 375.degree.-500.degree. C. for a period of at least 18 hours to develop an integral reduced layer in at least one surface of the article having a depth effective to prevent the transmission of ultraviolet radiation and radiation having a wavelength up to 550 nm through the article.Type: GrantFiled: November 7, 1994Date of Patent: July 30, 1996Assignee: Corning IncorporatedInventors: Thomas G. Havens, David J. Kerko, JoAnn Morrell
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Patent number: 5534041Abstract: Glass articles transparent to visible radiation, but opaque to ultraviolet radiation, rendering them particularly suitable for protecting the wearer of such lenses from exposure to laser radiation in the ultraviolet regions of the electromagnetic spectrum are produced. The method involves exposing silver halide-containing glass articles to flowing hydrogen in a heat chamber operating at 375.degree.-500.degree. C. for at least four hours to produce an integral reduced layer in at least one surface of the articles of sufficient depth to prevent the transmission of ultraviolet radiation through the articles.Type: GrantFiled: November 7, 1994Date of Patent: July 9, 1996Assignee: Corning IncorporatedInventors: Thomas G. Havens, David J. Kerko, JoAnn Morrell
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Patent number: 5491117Abstract: This invention is directed to the production of a silver halide-containing glass article essentially free from silver halide crystals exhibiting a bright yellow coloration which strongly attenuates the transmission of ultraviolet radiation and radiation having a wavelength up to about 450 nm, said article having an integral reduced surface layer thereon, the depth of that layer being sufficient to effectively prevent the transmission therethrough of ultraviolet radiation and radiation having a wavelength up to about 450 nm.Type: GrantFiled: January 23, 1995Date of Patent: February 13, 1996Assignee: Corning IncorporatedInventors: David J. Kerko, Brent M. Wedding
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Patent number: 5482902Abstract: This invention is directed primarily to a composition for a photochromic glass which is essentially colorless in the undarkened state consisting essentially, expressed in terms of weight percent, of______________________________________ SiO.sub.2 54-58 TiO.sub.2 0-2 PbO 0-0.8 B.sub.2 O.sub.3 18-22 ZrO.sub.2 2-4.5 Sb.sub.2 O.sub.3 0-0.2 Al.sub.2 O.sub.3 7-8 Ag 0.155-0.175 Er.sub.2 O.sub.3 0-0.5 Li.sub.2 O 3.75-4.5 Cl 0.3-0.4 Au 0-5 ppm Na.sub.2 O 0-1 Br 0.08-0.11 Pd 0.8-1.2 ppm K.sub.2 O 5.5-7.5 CuO 0.0065-0.01 ______________________________________wherein the mole ratio Li.sub.2 O:Na.sub.2 O.gtoreq.9:1, said glass at a thickness of 2 mm exhibiting a coloration in the fully darkened state corresponding to the chromaticity coordinates, in accordance with the 1931 C.I.E. trichromatic colorimetric system, falling within area IJKLI in the appended drawing.Type: GrantFiled: December 21, 1994Date of Patent: January 9, 1996Assignee: Corning IncorporatedInventors: Thomas C. Claunch, Thomas G. Havens, David J. Kerko
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Patent number: 5405811Abstract: This invention is directed to a transparent glass which, at a thickness of 2 mm, transmits less than 1% of ultraviolet radiation having a wavelength of 380 nm and exhibits a green fixed tint bounded by apices A,C,D,E,A of the drawing, a purity between 18-32%, and a dominant wavelength between 554-564 nm, said glass having a composition consisting essentially, expressed in terms of weight percent on the oxide basis, of______________________________________ SiO.sub.2 65-72 Na.sub.2 O + K.sub.2 O 15-21 B.sub.2 O.sub.3 3-8 CaO 0-4 Al.sub.2 O.sub.3 0.5-5 ZnO 0-9 Na.sub.2 O 6-12 CaO + ZnO 1-5 K.sub.2 O 6-12 Fe.sub.2 O.sub.3 4.8-7.Type: GrantFiled: February 28, 1994Date of Patent: April 11, 1995Assignee: Corning IncorporatedInventors: David J. Kerko, David W. Morgan