Patents by Inventor Jochen Alkemper

Jochen Alkemper 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).

  • Patent number: 11339082
    Abstract: Chemically toughened glass is provided that has a depth of compressive stress for potassium of at least 4 ?m and at most 8 ?m; a compressive stress at a depth of 30 ?m due to sodium exchange of at most 200 MPa and a minimum amount of at least 90 MPa where the thickness is 0.5 mm, at least 100 MPa where the thickness is 0.55 mm, at least 110 MPa in where the thickness is 0.6 mm, at least 120 MPa where the thickness is 0.7 mm, and at least 140 MPa where the thickness is 1 mm; a ratio of sodium exchange depth, in ?m, to the thickness, in mm, that is greater than 0.130; and a normalized integral of tensile stress that is a storable tensile stress of at least 20.6 MPa and at most 30 MPa.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: May 24, 2022
    Assignee: SCHOTT AG
    Inventors: Rüdiger Dietrich, Jochen Alkemper, Oliver Hochrein, Susanne Krüger, Julia Weißhuhn
  • Publication number: 20220153629
    Abstract: A chemically toughened or chemically toughenable sheet-like glass article is provided. The glass article includes a glass with a composition having Al2O3, SiO2, Li2O, and B2O3. The glass and/or the glass article includes not more than 7 w t% of B2O3.
    Type: Application
    Filed: February 4, 2022
    Publication date: May 19, 2022
    Applicant: SCHOTT AG
    Inventors: Inge BURGER, Thomas SEUTHE, Jochen ALKEMPER, Susanne KRÜGER, Oliver HOCHREIN, Rüdiger DIETRICH, Jovana DJORDJEVIC-REISS, Thomas SCHMIADY, Jörg HESSENKEMPER, Sebastian LEUKEL, Julia WEISSHUHN
  • Publication number: 20210238085
    Abstract: The invention relates to a coated glass substrate or glass ceramic substrate with resistant, multi-functional surface properties, including a combination of anti-microbial, anti-reflective and anti-fingerprint properties, or a combination of anti-microbial, anti-reflective and anti-fingerprint properties where the substrate is chemically pre-stressed, or a combination of anti-microbial and anti-reflective properties where the substrate is chemically pre-stressed. The coated glass substrate or glass ceramic substrate exhibits a unique combination of functions which are permanently present and do not exert a negative effect on each other.
    Type: Application
    Filed: April 22, 2021
    Publication date: August 5, 2021
    Applicant: Schott AG
    Inventors: Yigang Li, Guangjun Zhang, José Zimmer, Jochen Alkemper, Marta Krzyzak, Marten Walther
  • Patent number: 11021390
    Abstract: A thermally tempered glass element is provided made of glass with two opposite faces that are under compressive stress of at least 40 MPa. The glass has a working point at which the glass has a viscosity of 104 dPa·s of at most 1350° C. The glass has a viscosity versus temperature profile and a coefficient of thermal expansion versus temperature profile of the glass are such that a variable (750° C.?T13)/(CTELiq?CTESol) has a value of at most 5*106 K2. The CTELiq is a coefficient of linear thermal expansion of the glass above a glass transition temperature Tg, the CTESol is a coefficient of linear thermal expansion of the glass in a temperature range from 20° C. to 300° C., and the T13 is a temperature at which the glass has a viscosity of 1013 dPa·s.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: June 1, 2021
    Assignee: SCHOTT AG
    Inventors: Michael Schwall, Christian Mix, Jochen Alkemper, Peter Thomas
  • Publication number: 20210039981
    Abstract: A plate-shaped or disc-shaped, chemically prestressed or chemically prestressable glass article is provided. The article includes a glass with a composition of SiO2, Al2O3, and Li2O; and a set-drop strength of at least 50 and up to 150, given as drop height in cm, wherein the drop height is given as the mean value of 15 samples, with the use of a sandpaper grit of 60. The glass has one or more features including: a CIL of greater than 1 N, 1.2 N, 2N, or 3 N, a DoL of at least 90 ?m, 100 ?m, 115 ?m, or 130 ?m, a content of network formers of at least 82 wt. %, and a content of alkali oxides of at most 14 wt. % or 12 wt. %.
    Type: Application
    Filed: August 5, 2020
    Publication date: February 11, 2021
    Applicant: SCHOTT AG
    Inventors: Jochen Alkemper, Rüdiger Dietrich, Jovana Djordjevic-Reiss, Inge Burger
  • Publication number: 20210039990
    Abstract: A chemically prestressed or chemically prestressable, plate-shaped or disc-shaped glass article is provided. The glass article includes a glass with a composition of Al2O3, SiO2, Na2O, and Li2O and a prestressing or a prestressability in relation to the weight percent of Na2O of at least 250 MPa/g Na2O in 100 g of glass. The Na2O is present in a weight percent between at least 0.8 and at most 6.
    Type: Application
    Filed: August 5, 2020
    Publication date: February 11, 2021
    Applicant: SCHOTT AG
    Inventors: Sebastian Leukel, Thomas Seuthe, Jochen Alkemper, Julia Weißhuhn, Oliver Hochrein
  • Publication number: 20200354253
    Abstract: The invention relates to a method for producing a glass substrate for vehicle glazing, in particular for a windscreen of a vehicle, which comprises hot forming of a borosilicate glass, wherein in a hot forming section, at least during stretching of the glass (8) in the flow direction or longitudinal direction of movement of the glass (8), an aging velocity Av of the glass (8) to be hot formed does not exceed 10 mm/s and an aging velocity Av of the glass preferably does not undershoot 3 mm/s, and also relates to glass substrates for vehicle glazing produced by such method as well as to windscreen projection devices and driver assistance systems comprising such glass substrates.
    Type: Application
    Filed: March 4, 2020
    Publication date: November 12, 2020
    Applicant: SCHOTT AG
    Inventors: Thomas Seuthe, Thilo Zachau, Thomas Schmiady, Sandra von Fintel, Jochen Alkemper
  • Publication number: 20200238664
    Abstract: Thin glass substrates are provided. Also provided are methods and apparatuses for the production thereof and provides a thin glass substrate of improved optical quality. The method includes, after the melting and before a hot forming process, adjusting the viscosity of the glass that is to be formed or has at least partially been formed is in a defined manner for the thin glass substrate to be obtained. The apparatus includes a device for melting, a device for hot forming, and also a device for defined adjustment of the viscosity of the glass to be formed into a thin glass substrate, and the device for defined adjustment of the viscosity of the glass to be formed into a thin glass substrate is arranged upstream of the device for hot forming.
    Type: Application
    Filed: April 17, 2020
    Publication date: July 30, 2020
    Applicant: SCHOTT AG
    Inventors: Armin VOGL, Thomas SCHMIADY, Thilo ZACHAU, Michael MEISTER, Jochen ALKEMPER, Christian KUNERT, Lutz KLIPPE, Rüdiger DIETRICH
  • Publication number: 20200109080
    Abstract: Chemically toughened glass is provided that has a depth of compressive stress for potassium of at least 4 ?m and at most 8 ?m; a compressive stress at a depth of 30 ?m due to sodium exchange of at most 200 MPa and a minimum amount of at least 90 MPa where the thickness is 0.5 mm, at least 100 MPa where the thickness is 0.55 mm, at least 110 MPa in where the thickness is 0.6 mm, at least 120 MPa where the thickness is 0.7 mm, and at least 140 MPa where the thickness is 1 mm; a ratio of sodium exchange depth, in ?m, to the thickness, in mm, that is greater than 0.130; and a normalized integral of tensile stress that is a storable tensile stress of at least 20.6 MPa and at most 30 MPa.
    Type: Application
    Filed: October 8, 2019
    Publication date: April 9, 2020
    Applicant: SCHOTT AG
    Inventors: Rüdiger Dietrich, Jochen Alkemper, Oliver Hochrein, Susanne Krüger, Julia Weißhuhn
  • Publication number: 20200055769
    Abstract: A thermally tempered glass element is provided made of glass with two opposite faces that are under compressive stress of at least 40 MPa. The glass has a working point at which the glass has a viscosity of 104 dPa·s of at most 1350° C. The glass has a viscosity versus temperature profile and a coefficient of thermal expansion versus temperature profile of the glass are such that a variable (750° C.?T13)/(CTELiq?CTESol) has a value of at most 5*106 K2. The CTELiq is a coefficient of linear thermal expansion of the glass above a glass transition temperature Tg, the CTESol is a coefficient of linear thermal expansion of the glass in a temperature range from 20° C. to 300° C., and the T13 is a temperature at which the glass has a viscosity of 1013 dPa·s.
    Type: Application
    Filed: October 25, 2019
    Publication date: February 20, 2020
    Applicant: SCHOTT AG
    Inventors: Michael Schwall, Christian Mlx, Jochen Alkemper, Peter Thomas
  • Patent number: 10494293
    Abstract: A thermally tempered glass element is provided made of glass with two opposite faces that are under compressive stress of at least 40 MPa. The glass has a working point at which the glass has a viscosity of 104 dPa·s of at most 1350° C. The glass has a viscosity versus temperature profile and a coefficient of thermal expansion versus temperature profile of the glass are such that a variable (750° C.?T13)/(CTELiq?CTESol) has a value of at most 5*106 K2. The CTELiq is a coefficient of linear thermal expansion of the glass above a glass transition temperature Tg, the CTESol is a coefficient of linear thermal expansion of the glass in a temperature range from 20° C. to 300° C., and the T13 is a temperature at which the glass has a viscosity of 1013 dPa·s.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: December 3, 2019
    Assignee: SCHOTT AG
    Inventors: Michael Schwall, Christian Mlx, Jochen Alkemper, Peter Thomas
  • Patent number: 10442723
    Abstract: An alkali borosilicate glass is provided that includes: SiO2 70-86 wt % Al2O3 0-5 wt % B2O3 9.0-25 wt % Na2O 0.5-5.0 wt % K2O 0-1.0 wt %, and Li2O 0-1.0 wt %. The proportions of the components are chosen in such a way that the weighted crosslinking index, that is, the mean number n of constraints per atom has a value greater than 2.9.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: October 15, 2019
    Assignee: SCHOTT AG
    Inventors: Gerhard Lautenschlaeger, Jochen Alkemper, Ulf Dahlmann, Ulrich Fotheringham
  • Publication number: 20190308394
    Abstract: A laminated glass pane is provided that includes a first glass sheet, a polymeric layer having a thickness between at least 0.5 mm and at most 1.7 mm, and a second inner glass sheet which has a thickness of at least 0.3 mm and at most 1.5 mm and is made of a lithium aluminum silicate glass. The polymeric layer is disposed between the at least two glass sheets. Furthermore, the glasses of the first and the second glass sheets are matched so that the temperatures at which the two glasses of the first and second glass sheets have the same viscosity in the viscosity range between 107 dPa·s and 1010 dPa·s differ from each other only by a maximum of 50° C.
    Type: Application
    Filed: June 24, 2019
    Publication date: October 10, 2019
    Applicant: SCHOTT AG
    Inventors: Jochen ALKEMPER, Lutz KLIPPE, Rüdiger DIETRICH
  • Publication number: 20190308900
    Abstract: A thin glass substrate, as well as a method and an apparatus are provided. The glass substrate has a glass having first and second main surfaces and elongated elevations on one of the main surfaces. The elevations rise in a normal direction, have a longitudinal extent that is greater than two times a transverse extent, and have a height, on average, that is less than 100 nm, and with a transverse extent of the elevation smaller than 40 mm. The method includes melting a glass, hot forming the glass, and adjusting a viscosity of the glass so that for the viscosity ?1 for a first stretch over a first distance of up to 1.5 m downstream of a flow rate control component and y1 indicating a second distance to a location immediately downstream the flow rate control component the equation lg ?1(y1)/dPa·s=(lg ?01/dPa·s+a1(y1)) applies.
    Type: Application
    Filed: June 24, 2019
    Publication date: October 10, 2019
    Applicant: SCHOTT AG
    Inventors: Armin VOGL, Thomas SCHMIADY, Thilo ZACHAU, Jochen ALKEMPER, Michael MEISTER, Christian KUNERT, Lutz KLIPPE, Rüdiger DIETRICH
  • Patent number: 9952378
    Abstract: A light guide plate for guiding of visible light for the backlighting of a liquid crystal display is provided. The light guide plate has two parallel lateral faces and at least one edge face, which serves preferably as a light input face. The light guide plate is a glass that contains B2O3 and SiO2 as components, wherein the total content of B2O3 and SiO2 is at least 70 weight percent and the B2O3 content is greater than 10%. The total content of metal oxide of divalent metals in the composition of the glass is less than 3 weight percent. Al2O3 is contained between 1 weight percent and 5 weight percent in the composition.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: April 24, 2018
    Assignee: SCHOTT AG
    Inventors: Gerhard Lautenschläger, Thomas Kloss, Jochen Alkemper, Matthias Schmidt, Andreas Voitsch
  • Publication number: 20170233287
    Abstract: The invention relates to a coated glass substrate or glass ceramic substrate with resistant, multi-functional surface properties, including a combination of anti-microbial, anti-reflective and anti-fingerprint properties, or a combination of anti-microbial, anti-reflective and anti-fingerprint properties where the substrate is chemically pre-stressed, or a combination of anti-microbial and anti-reflective properties where the substrate is chemically pre-stressed. The coated glass substrate or glass ceramic substrate exhibits a unique combination of functions which are permanently present and do not exert a negative effect on each other.
    Type: Application
    Filed: March 9, 2017
    Publication date: August 17, 2017
    Applicant: Schott AG
    Inventors: Yigang Li, Guangjun Zhang, José Zimmer, Jochen Alkemper, Marta Krzyzak, Marten Walther
  • Publication number: 20170183257
    Abstract: The invention relates to a method for producing a coated, chemically prestressed glass substrate having anti-fingerprint properties. The method includes: applying at least one functional layer to a glass substrate; chemically prestressing the coated glass substrate by an ion exchange, where existing smaller alkali metal ions are exchanged for larger alkali metal ions, and are enriched in the glass substrate and the at least one functional layer; activating the surface of the at least one functional layer, where if more than one functional layer is present the surface of the outermost or uppermost layer is activated, the activating including one of several alternatives; and applying an amphiphobic coating to the at least one functional layer of the glass substrate, where, as a result of the activation process, the functional layer interacts with the amphiphobic coating.
    Type: Application
    Filed: March 10, 2017
    Publication date: June 29, 2017
    Applicant: Schott AG
    Inventors: Dirk Apitz, Marta Krzyzak, Marten Walther, Jochen Alkemper
  • Publication number: 20170183255
    Abstract: A coated chemically strengthened flexible thin glass includes a coating of an adhesive layer in the form of a silicon mixed oxide layer, which contains or consists of a silicon oxide layer in combination with at least one oxide of aluminum, tin, magnesium, phosphorus, cerium, zirconium, titanium, cesium, barium, strontium, niobium, zinc, or boron, and magnesium fluoride, such as at least aluminum oxide.
    Type: Application
    Filed: March 10, 2017
    Publication date: June 29, 2017
    Applicant: Schott AG
    Inventors: Marten Walther, Marta Krzyzak, Dirk Apitz, Jochen Alkemper
  • Publication number: 20170152171
    Abstract: A thermally tempered glass element is provided made of glass with two opposite faces that are under compressive stress of at least 40 MPa. The glass has a working point at which the glass has a viscosity of 104 dPa·s of at most 1350° C. The glass has a viscosity versus temperature profile and a coefficient of thermal expansion versus temperature profile of the glass are such that a variable (750° C.?T13)/(CTELiq?CTESol) has a value of at most 5*106 K2. The CTELiq is a coefficient of linear thermal expansion of the glass above a glass transition temperature Tg, the CTESol is a coefficient of linear thermal expansion of the glass in a temperature range from 20° C. to 300° C., and the T13 is a temperature at which the glass has a viscosity of 1013 dPa·s.
    Type: Application
    Filed: November 23, 2016
    Publication date: June 1, 2017
    Applicant: SCHOTT AG
    Inventors: Michael Schwall, Christian MIx, Jochen Alkemper, Peter Thomas
  • Publication number: 20170052311
    Abstract: A light guide plate for guiding of visible light for the backlighting of a liquid crystal display is provided. The light guide plate has two parallel lateral faces and at least one edge face, which serves preferably as a light input face. The light guide plate is a glass that contains B2O3 and SiO2 as components, wherein the total content of B2O3 and SiO2 is at least 70 weight percent and the B2O3 content is greater than 10%. The total content of metal oxide of divalent metals in the composition of the glass is less than 3 weight percent. Al2O3 is contained between 1 weight percent and 5 weight percent in the composition.
    Type: Application
    Filed: August 17, 2016
    Publication date: February 23, 2017
    Applicant: SCHOTT AG
    Inventors: Gerhard Lautenschläger, Thomas Kloss, Jochen Alkemper, Matthias Schmidt, Andreas Voitsch