Patents by Inventor Ljerka Ukrainczyk

Ljerka Ukrainczyk 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).

  • LITHIUM CONTAINING GLASS OR GLASS CERAMIC ARTICLE WITH MODIFIED K2O PROFILE NEAR THE GLASS SURFACE
    Publication number: 20190389764
    Abstract: A method of reworking lithium containing ion exchanged glass articles is provided. The method includes a reverse ion exchange process that returns the glass article to approximately the composition of the glass from which the glass article was produced, before being subjected to ion exchange. The reworked glass articles exhibit a K2O concentration profile comprising a portion wherein a K2O concentration increases to a local K2O concentration maximum.
    Type: Application
    Filed: February 2, 2017
    Publication date: December 26, 2019
    Inventors: Ryan Claude Andrews, Jill Marie Hall, Pascale Oram, Rostislav Vatchev Roussev, Vitor Marino Schneider, Ljerka Ukrainczyk
  • FRACTURE RESISTANT STRESS PROFILES IN GLASSES
    Publication number: 20190375679
    Abstract: Glass-based articles comprise stress profiles providing improved fracture resistance. The glass-based articles herein provide high fracture resistance after multiple drops.
    Type: Application
    Filed: June 7, 2019
    Publication date: December 12, 2019
    Inventors: Timothy Michael Gross, Xiaoju Guo, Jason Thomas Harris, Peter Joseph Lezzi, Alexandra Lai Ching Kao Andr Mitchell, Pascale Oram, Kevin Barry Reiman, Rostislav Vatchev Roussev, Ljerka Ukrainczyk
  • Methods of forming shaped glass articles from glass sheets
    Patent number: 10479052
    Abstract: A method of forming a 3D glass article from a glass sheet includes locating the glass sheet on a mold assembly including a mold surface with a 3D surface profile corresponding to that of the 3D glass article. The glass sheet is heated to a forming temperature. The forming temperature is greater than a temperature of the mold surface. The heated glass sheet is forced onto the mold surface by applying a pressurized gas to a first surface of the glass sheet opposite the mold surface to conform the glass sheet to the mold surface with the glass sheet at the forming temperature that is greater than the temperature of the mold surface.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: November 19, 2019
    Assignee: CORNING INCORPORATED
    Inventors: Ljerka Ukrainczyk, John Richard Ridge, Marianne Griesbach Park
  • MOLDS AND METHODS TO CONTROL MOLD SURFACE QUALITY
    Publication number: 20190330096
    Abstract: A method for treating a mold includes grinding an outer metal surface of a mold body of the mold with a first material; lapping the outer metal surface after the grinding with a second material that is finer than the first material; and polishing the outer metal surface after the lapping to achieve an average surface roughness (Ra) less than or equal to about 0.15 ?m and a waviness height (Wa) less than or equal to about 100 nm. A mold for shaping glass-based material can include a mold body having an outer metal surface, wherein the outer metal surface has an average surface roughness (Ra) less than or equal to about 0.15 ?m and a waviness height (Wa) less than or equal to about 100 nm.
    Type: Application
    Filed: July 9, 2019
    Publication date: October 31, 2019
    Inventors: Yi-Chun Chiang, Jill Marie Hall, Fang-Yu Hsu, Shen Li, Ljerka Ukrainczyk, Hong Chih Wang
  • Methods of forming shaped glass articles from glass sheets
    Patent number: 10442160
    Abstract: A method of forming a 3D glass article from a glass sheet includes locating the glass sheet on a mold assembly including a mold surface with a 3D surface profile corresponding to that of the 3D glass article. The glass sheet is heated to a forming temperature. The forming temperature is greater than a temperature of the mold surface. The heated glass sheet is forced onto the mold surface by applying a pressurized gas to a first surface of the glass sheet opposite the mold surface to conform the glass sheet to the mold surface with the glass sheet at the forming temperature that is greater than the temperature of the mold surface.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: October 15, 2019
    Assignee: CORNING INCORPORATED
    Inventors: Ljerka Ukrainczyk, John Richard Ridge, Marianne Griesbach Park
  • Molds with coatings for high temperature use in shaping glass-based material
    Patent number: 10435325
    Abstract: A mold with a multi-layer coating is disclosed. The mold may include a mold body having an outer surface and a multi-layer coating disposed on the outer surface. The multi-layer coating may include a diffusion barrier layer disposed on the outer surface of the mold body and an intermetallic layer disposed on the diffusion barrier layer, wherein the intermetallic layer comprises Ti, Al, and an additional metal selected from the group consisting of Zr, Ta, Nb, Y, Mo, Hf, and combinations thereof. The diffusion barrier layer may restrict diffusion of metal from the mold body to the intermetallic layer.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: October 8, 2019
    Assignee: CORNING INCORPORATED
    Inventors: Jill Marie Hall, Ljerka Ukrainczyk
  • Shaped glass articles and methods for forming the same
    Patent number: 10377656
    Abstract: A method includes contacting a second layer of a glass sheet with a forming surface to form a shaped glass article. The glass sheet includes a first layer adjacent to the second layer. The first layer includes a first glass composition. The second layer includes a second glass composition. An effective viscosity of the glass sheet during the contacting step is less than a viscosity of the second layer of the glass sheet during the contacting step. A shaped glass article includes a first layer including a first glass composition and a second layer including a second glass composition. A softening point of the first glass composition is less than a softening point of the second glass composition. An effective 108.2 P temperature of the glass article is at most about 900° C.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: August 13, 2019
    Assignee: Corning Incorporated
    Inventors: Thierry Luc Alain Dannoux, Vladislav Yuryevich Golyatin, John Richard Ridge, Ljerka Ukrainczyk, Butchi Reddy Vaddi, Natesan Venkataraman
  • Molds and methods to control mold surface quality
    Patent number: 10351459
    Abstract: A method for treating a mold includes grinding an outer metal surface of a mold body of the mold with a first material; lapping the outer metal surface after the grinding with a second material that is finer than the first material; and polishing the outer metal surface after the lapping to achieve an average surface roughness (Ra) less than or equal to about 0.15 ?m and a waviness height (Wa) less than or equal to about 100 nm. A mold for shaping glass-based material can include a mold body having an outer metal surface, wherein the outer metal surface has an average surface roughness (Ra) less than or equal to about 0.15 ?m and a waviness height (Wa) less than or equal to about 100 nm.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: July 16, 2019
    Assignee: CORNING INCORPORATED
    Inventors: Yi-Chun Chiang, Jill Marie Hall, Shen Li, Ljerka Ukrainczyk, Hong Chih Wang, Fang-Yu Hsu
  • GLASS-BASED ARTICLES WITH SECTIONS OF DIFFERENT THICKNESSES
    Publication number: 20190106353
    Abstract: Glass-based articles having sections of different thicknesses where a maximum central tension in a thinner section is less than that of a thicker section. The articles comprise an alkali metal oxide having a independent nonzero concentrations that vary along at least a portion of the thickness of each section. Consumer electronic products may comprise the glass-based articles having sections of different thicknesses.
    Type: Application
    Filed: October 3, 2018
    Publication date: April 11, 2019
    Inventors: Rohit Rai, Ljerka Ukrainczyk
  • METHODS FOR REGENERATING LITHIUM-ENRICHED SALT BATHS
    Publication number: 20180362399
    Abstract: Methods for regenerating poisoned salt bath comprising providing a salt bath comprising at least one of KNO3 and NaNO3, providing an ion-exchangeable substrate comprising lithium cations, contacting at least a portion of the ion-exchangeable substrate with the salt bath, whereby lithium cations in the salt bath diffuse from the ion-exchangeable substrate and are dissolved in the salt bath, and selectively precipitating dissolved lithium cations from the salt bath using phosphate salt. The methods further include preventing or reducing the formation of surface defects in the ion-exchangeable substrate by preventing or reducing the formation of crystals on the surface of the ion-exchangeable substrate upon removal from the salt bath.
    Type: Application
    Filed: November 18, 2016
    Publication date: December 20, 2018
    Inventors: Jaymin Amin, Xiaoju Guo, Todd LeRoy Heck, Hongmei Hu, Yuhui Jin, Pascale Oram, Ljerka Ukrainczyk
  • COVER GLASS ARTICLE
    Publication number: 20180343758
    Abstract: A cover glass article includes a glass body having a three-dimensional shape, an inside surface, and an outside surface. Each of the inside and outside surfaces has a surface roughness (Ra) less than 1 nm and is free of indentations having diameters larger than 150 ?m.
    Type: Application
    Filed: July 26, 2018
    Publication date: November 29, 2018
    Inventors: Karl David Ehemann, Keith Raymond Gaylo, William Brashear Mattingly, III, Connor Thomas O'Malley, Ljerka Ukrainczyk, Kevin Lee Wasson
  • METHODS FOR REGENERATING LITHIUM-ENRICHED SALT BATHS
    Publication number: 20180327305
    Abstract: Methods for regenerating poisoned salt bath comprising providing a salt bath comprising at least one of KNO3 and NaNO3, providing an ion-exchangeable substrate comprising lithium cations, contacting at least a portion of the ion-exchangeable substrate with the salt bath, whereby lithium cations in the salt bath diffuse from the ion-exchangeable substrate and are dissolved in the salt bath, and selectively precipitating dissolved lithium cations from the salt bath using phosphate salt. The methods further include preventing or reducing the formation of surface defects in the ion-exchangeable substrate by preventing or reducing the formation of crystals on the surface of the ion-exchangeable substrate upon removal from the salt bath.
    Type: Application
    Filed: July 24, 2018
    Publication date: November 15, 2018
    Inventors: Jaymin Amin, Xiaoju Guo, Todd LeROY Heck, Hongmei Hu, Yuhui Jin, Pascale Oram, Ljerka Ukrainczyk
  • Cover glass article
    Patent number: 10051753
    Abstract: A cover glass article includes a glass body having a three-dimensional shape, an inside surface, and an outside surface. Each of the inside and outside surfaces has a surface roughness (Ra) less than 1 nm and is free of indentations having diameters larger than 150 ?m.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: August 14, 2018
    Assignee: CORNING INCORPORATED
    Inventors: Karl David Ehemann, Keith Raymond Gaylo, William Brashear Mattingly, III, Connor Thomas O'Malley, Ljerka Ukrainczyk, Kevin Lee Wasson
  • METHODS OF MANUFACTURING GLASS ARTICLES USING ANISOTHERMAL TEMPERATURE PROFILES
    Publication number: 20180186675
    Abstract: According to one embodiment, a method of manufacturing a glass article having a three-dimensional shape includes heating a glass article blank to a temperature above a setting temperature and coupling the glass article blank to an open-faced mold. The open-faced mold includes a molding region that has a three-dimensional shape that generally corresponds to the shape of the glass article and has an anisothermal temperature profile within the molding region. The method further includes maintaining an anisothermal temperature profile along the glass article blank and cooling the glass article blank while the glass article blank is coupled to the molding region of the open-faced mold to set the shape of the glass article.
    Type: Application
    Filed: February 27, 2018
    Publication date: July 5, 2018
    Inventors: Weiwei Luo, Rohit Rai, Ljerka Ukrainczyk, Zheming Zheng, Sam Samer Zoubi
  • Method and system for making a glass article with uniform mold temperature
    Patent number: 9975800
    Abstract: A glass sheet is formed on a mold into a glass article having a three-dimensional shape. The mold, with the glass article thereon, is arranged within an interior space of a radiation shield such that the mold is between a leading end barrier and a trailing end barrier of the radiation shield. The mold, glass article, and radiation shield are translated through a sequence of cooling stations while maintaining the mold between the leading and trailing end barriers, wherein the leading and trailing end barriers inhibit radiation heat transfer at leading and trailing ends of the mold.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: May 22, 2018
    Assignee: CORNING INCORPORATED
    Inventors: Thierry Luc Alain Dannoux, Raymond Chih Chung Hsiao, Nikolaos Pantelis Kladias, Rohit Rai, John Richard Ridge, John Robert Saltzer, Jr., Ljerka Ukrainczyk
  • PROCESSES OF MAKING GLASS WITH TEXTURED SURFACE AND 3-D SHAPE
    Publication number: 20180134614
    Abstract: A process for forming a textured 3-D glass-based substrate includes texturing a first surface of a glass-based substrate and shaping the glass-based substrate into a three-dimensional shape. The surface profile of the substrate is non-planar. In some embodiments, texturing the first surface of the glass-based substrate provides the first surface with an average roughness of 10 nm to 2000 nm.
    Type: Application
    Filed: November 15, 2017
    Publication date: May 17, 2018
    Inventors: Jill Marie Hall, Yuhui Jin, Timothy James Kiczenski, John Richard Ridge, Ljerka Ukrainczyk
  • METHOD AND SYSTEM FOR FORMING SHAPED GLASS ARTICLES
    Publication number: 20180134602
    Abstract: A method of forming a shaped glass article includes placing a glass sheet on a mold such that a first glass area of the glass sheet corresponds to a first mold surface area of the mold and a second glass area of the glass sheet corresponds to a second mold surface area of the mold. The first glass area and the second glass area are heated such that the viscosity of the second glass area is 8 poise or more lower than the viscosity of the first glass area. A force is applied to the glass sheet to conform the glass sheet to the mold surface. During the heating of the second glass area, the first mold surface area is locally cooled to induce a thermal gradient on the mold.
    Type: Application
    Filed: January 16, 2018
    Publication date: May 17, 2018
    Inventors: Jacob Immerman, Thomas Augustus Keebler, John Robert Saltzer, JR., Ljerka Ukrainczyk
  • Method and system for forming shaped glass articles
    Patent number: 9938179
    Abstract: A method of forming a shaped glass article includes placing a glass sheet on a mold such that a first glass area of the glass sheet corresponds to a first mold surface area of the mold and a second glass area of the glass sheet corresponds to a second mold surface area of the mold. The first glass area and the second glass area are heated such that the viscosity of the second glass area is 8 poise or more lower than the viscosity of the first glass area. A force is applied to the glass sheet to conform the glass sheet to the mold surface. During the heating of the second glass area, the first mold surface area is locally cooled to induce a thermal gradient on the mold.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: April 10, 2018
    Assignee: CORNING INCORPORATED
    Inventors: Jacob Immerman, Thomas Augustus Keebler, John Robert Saltzer, Jr., Ljerka Ukrainczyk
  • Methods of manufacturing glass articles using anisothermal temperature profiles
    Patent number: 9938178
    Abstract: According to one embodiment, a method of manufacturing a glass article having a three-dimensional shape includes heating a glass article blank to a temperature above a setting temperature and coupling the glass article blank to an open-faced mold. The open-faced mold includes a molding region that has a three-dimensional shape that generally corresponds to the shape of the glass article and has an anisothermal temperature profile within the molding region. The method further includes maintaining an anisothermal temperature profile along the glass article blank and cooling the glass article blank while the glass article blank is coupled to the molding region of the open-faced mold to set the shape of the glass article.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: April 10, 2018
    Assignee: CORNING INCORPORATED
    Inventors: Weiwei Luo, Rohit Rai, Ljerka Ukrainczyk, Zheming Zheng, Sam Samer Zoubi
  • Method for stripping nitride coatings
    Patent number: 9903040
    Abstract: Methods for stripping partially oxidized nitride wear or release coatings from metal workpieces comprise disrupting surface oxidation layers present on the coatings following use, and causing electrical current to flow from the workpiece and release coating to a counter electrode while the workpiece, release coating and counter electrode are immersed in an aqueous alkaline electrolyte solution.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: February 27, 2018
    Assignee: CORNING INCORPORATED
    Inventors: Jiangwei Feng, Todd M Harvey, Shrisudersan Jayaraman, Ljerka Ukrainczyk