Patents by Inventor Douglas Clippinger Allan
Douglas Clippinger Allan 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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Publication number: 20170144918Abstract: Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs) and active matrix organic light emitting diode displays (AMOLEDs). In accordance with certain of its aspects, the glasses possess excellent compaction and stress relaxation properties.Type: ApplicationFiled: February 6, 2017Publication date: May 25, 2017Inventors: Douglas Clippinger Allan, Bradley Frederick Bowden, Adam James Ellison, Timothy James Kiczenski, Marcel Potuzak
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Publication number: 20170076024Abstract: Computer-implemented methods and apparatus are provided for predicting/estimating (i) a non-equilibrium viscosity for at least one given time point in a given temperature profile for a given glass composition, (ii) at least one temperature profile that will provide a given non-equilibrium viscosity for a given glass composition, or (iii) at least one glass composition that will provide a given non-equilibrium viscosity for a given time point in a given temperature profile. The methods and apparatus can be used to predict/estimate stress relaxation in a glass article during forming as well as compaction, stress relaxation, and/or thermal sag or thermal creep of a glass article when the article is subjected to one or more post-forming thermal treatments.Type: ApplicationFiled: November 17, 2016Publication date: March 16, 2017Inventors: Douglas Clippinger Allan, Adam James Ellison, Xiaoju Guo, Timothy James Kiczenski, John Christopher Mauro, Marcel Potuzak
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Patent number: 9573839Abstract: Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs) and active matrix organic light emitting diode displays (AMOLEDs). In accordance with certain of its aspects, the glasses possess excellent compaction and stress relaxation properties.Type: GrantFiled: February 19, 2016Date of Patent: February 21, 2017Assignee: Corning IncorporatedInventors: Douglas Clippinger Allan, Bradley Frederick Bowden, Adam James Ellison, Timothy James Kiczenski, Marcel Potuzak
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Patent number: 9533907Abstract: Computer-implemented methods and apparatus are provided for predicting/estimating (i) a non-equilibrium viscosity for at least one given time point in a given temperature profile for a given glass composition, (ii) at least one temperature profile that will provide a given non-equilibrium viscosity for a given glass composition, or (iii) at least one glass composition that will provide a given non-equilibrium viscosity for a given time point in a given temperature profile. The methods and apparatus can be used to predict/estimate stress relaxation in a glass article during forming as well as compaction, stress relaxation, and/or thermal sag or thermal creep of a glass article when the article is subjected to one or more post-forming thermal treatments.Type: GrantFiled: October 29, 2012Date of Patent: January 3, 2017Assignee: CORNING INCORPORATEDInventors: Douglas Clippinger Allan, Adam James Ellison, Xiaoju Guo, Timothy James Kiczenski, John Christopher Mauro, Marcel Potuzak
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Publication number: 20160168013Abstract: Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs) and active matrix organic light emitting diode displays (AMOLEDs). In accordance with certain of its aspects, the glasses possess excellent compaction and stress relaxation properties.Type: ApplicationFiled: February 19, 2016Publication date: June 16, 2016Inventors: Douglas Clippinger Allan, Bradley Frederick Bowden, Adam James Ellison, Timothy James Kiczenski, Marcel Potuzak
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Patent number: 9328013Abstract: Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs) and active matrix organic light emitting diode displays (AMOLEDs). In accordance with certain of its aspects, the glasses possess excellent compaction and stress relaxation properties.Type: GrantFiled: June 2, 2015Date of Patent: May 3, 2016Assignee: Corning IncorporatedInventors: Douglas Clippinger Allan, Bradley Frederick Bowden, Adam James Ellison, Timothy James Kiczenski, Marcel Potuzak
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Publication number: 20160016849Abstract: Methods are provided for measuring the asymmetry of glass-sheet manufacturing processes. The methods include subjecting glass sheets or test samples taken from glass sheets to an ion-exchange process and measuring warp values. Metrics for the asymmetry of the glass-sheet manufacturing process are then obtained from the warp values. In one embodiment, the metric is independent of the geometry of the glass sheets or the test samples (the BM1 metric); in another embodiment, the metric is independent of the geometry of the glass sheets or the test samples and substantially independent of the ion-exchange process used in the testing (the ASYM metric).Type: ApplicationFiled: September 30, 2015Publication date: January 21, 2016Inventor: Douglas Clippinger Allan
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Patent number: 9187365Abstract: Methods are provided for measuring the asymmetry of glass-sheet manufacturing processes. The methods include subjecting glass sheets or test samples taken from glass sheets to an ion-exchange process and measuring warp values. Metrics for the asymmetry of the glass-sheet manufacturing process are then obtained from the warp values. In one embodiment, the metric is independent of the geometry of the glass sheets or the test samples (the BM1 metric); in another embodiment, the metric is independent of the geometry of the glass sheets or the test samples and substantially independent of the ion-exchange process used in the testing (the ASYM metric).Type: GrantFiled: January 31, 2014Date of Patent: November 17, 2015Assignee: CORNING INCORPORATEDInventor: Douglas Clippinger Allan
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Patent number: 9140543Abstract: Systems and methods for measuring the stress profile of ion-exchanged glass are disclosed, based on the TM and TE guided mode spectra of the optical waveguide formed in the ion-exchanged glass. The method includes digitally defining from the TM and TE guided mode spectra positions of intensity extrema, and calculating respective TM and TE effective refractive indices from these positions. The method also includes calculating TM and TE refractive index profiles nTM(z) and nTE(z) using either an inverse WKB calculation or a fitting process that employs assumed functions for nTM(z) and nTE(z). The method also includes calculating the stress profile S(z)=[nTM(z)?nTE(z)]/SOC, where SOC is a stress optic coefficient for the glass substrate. Systems for performing the method are also disclosed.Type: GrantFiled: May 3, 2012Date of Patent: September 22, 2015Assignee: CORNING INCORPORATEDInventors: Douglas Clippinger Allan, Karl William Koch, III, Rostislav Vatchev Roussev, Robert Anthony Schaut, Vitor Marino Schneider
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Publication number: 20150259241Abstract: Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs) and active matrix organic light emitting diode displays (AMOLEDs). In accordance with certain of its aspects, the glasses possess excellent compaction and stress relaxation properties.Type: ApplicationFiled: June 2, 2015Publication date: September 17, 2015Inventors: Douglas Clippinger Allan, Bradley Frederick Bowden, Adam James Ellison, Timothy James Kiczenski, Marcel Potuzak
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Patent number: 9051206Abstract: Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs) and active matrix organic light emitting diode displays (AMOLEDs). In accordance with certain of its aspects, the glasses possess excellent compaction and stress relaxation properties.Type: GrantFiled: December 19, 2013Date of Patent: June 9, 2015Assignee: Corning IncorporatedInventors: Douglas Clippinger Allan, Bradley Frederick Bowden, Adam James Ellison, Timothy James Kiczenski, Marcel Potuzak
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Publication number: 20150147574Abstract: A method for generating various stress profiles for chemically strengthened glass. An alkali aluminosilicate glass is brought into contact with an ion exchange media such as, for example, a molten salt bath containing an alkali metal cation that is larger than an alkali metal cation in the glass. The ion exchange is carried out at temperatures greater than about 420° C. and at least about 30° C. below the anneal point of the glass.Type: ApplicationFiled: November 13, 2014Publication date: May 28, 2015Inventors: Douglas Clippinger Allan, Xiaoju Guo, Guangli Hu, Gaozhu Peng
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Patent number: 8975198Abstract: Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs) and active matrix organic light emitting diode displays (AMOLEDs). In accordance with certain of its aspects, the glasses possess excellent compaction and stress relaxation properties.Type: GrantFiled: May 15, 2014Date of Patent: March 10, 2015Assignee: Corning IncorporatedInventors: Douglas Clippinger Allan, Bradley Frederick Bowden, Adam James Ellison, Timothy James Kiczenski, Marcel Potuzak
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Publication number: 20140345325Abstract: A method for optimizing ion exchange of glass. The glass is ion exchanged in a series of two ion exchange baths. The first ion exchange bath contains an amount of a poisoning ion or salt and the second ion exchange bath contains an amount of the poisoning ion or salt that is less than that in the first bath. When the concentration of the poisoning ion/salt in the first bath reaches a maximum value, the first bath is discarded and replaced by the second bath and a third bath that initially does not contain the poisoning cation/salt replaces the second ion exchange bath. This cycling of baths may be repeated to produce a plurality of glass articles, each having a surface layer under a compressive stress and depth of layer that are within predetermined limits.Type: ApplicationFiled: May 19, 2014Publication date: November 27, 2014Applicant: Corning IncorporatedInventors: Douglas Clippinger Allan, Sumalee Likitvanichkul, Mehmet Derya Tetiker
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Publication number: 20140249017Abstract: Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs) and active matrix organic light emitting diode displays (AMOLEDs). In accordance with certain of its aspects, the glasses possess excellent compaction and stress relaxation properties.Type: ApplicationFiled: May 15, 2014Publication date: September 4, 2014Applicant: Corning IncorporatedInventors: Douglas Clippinger Allan, Bradley Frederick Bowden, Adam James Ellison, Timothy James Kiczenski, Marcel Potuzak
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Publication number: 20140242390Abstract: Methods are provided for measuring the asymmetry of glass-sheet manufacturing processes. The methods include subjecting glass sheets or test samples taken from glass sheets to an ion-exchange process and measuring warp values. Metrics for the asymmetry of the glass-sheet manufacturing process are then obtained from the warp values. In one embodiment, the metric is independent of the geometry of the glass sheets or the test samples (the BM1 metric); in another embodiment, the metric is independent of the geometry of the glass sheets or the test samples and substantially independent of the ion-exchange process used in the testing (the ASYM metric).Type: ApplicationFiled: January 31, 2014Publication date: August 28, 2014Applicant: CORNING INCORPORATEDInventor: DOUGLAS CLIPPINGER ALLAN
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Publication number: 20140179510Abstract: Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs) and active matrix organic light emitting diode displays (AMOLEDs). In accordance with certain of its aspects, the glasses possess excellent compaction and stress relaxation properties.Type: ApplicationFiled: December 19, 2013Publication date: June 26, 2014Applicant: Corning IncorporatedInventors: Douglas Clippinger Allan, Bradley Frederick Bowden, Adam James Ellison, Timothy James Kiczenski, Marcel Potuzak
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Patent number: 8720226Abstract: Computer-implemented methods and apparatus are provided for predicting/estimating chemical depth of layer (DOL) and maximum surface compressive stress (CS) of glass articles after ion-exchange. The methods and apparatus can, for example, be used to select glass compositions, salt bath temperatures, and/or ion-exchange times which provide desired DOL and/or CS values. One or more manufacturing constraints, e.g., constraints on liquidus viscosity, zircon breakdown viscosity, and the like, can be applied to the process of predicting/estimating DOL and/or CS values so that glass compositions selected based on DOL and/or CS values can, for example, be manufactured commercially by a fusion or float process.Type: GrantFiled: March 12, 2012Date of Patent: May 13, 2014Assignee: Corning IncorporatedInventors: Douglas Clippinger Allan, Adam James Ellison, John Christopher Mauro
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Patent number: 8666705Abstract: Methods and apparatus for predicting viscosities of glass materials as a function of temperature and composition are provided. Two fitting parameters (fitting coefficients) are used for each of the viscosity-affecting components contained in the material. The parameters can accurately cover a wide range of temperatures (i.e., a wide range of viscosities) and a wide range of compositions. The viscosity predictions can be used as a guide for glass research as well as in feedback control systems for glass manufacturing processes. Methods and apparatus for predicting glass resistivity are also disclosed.Type: GrantFiled: October 1, 2010Date of Patent: March 4, 2014Assignee: Corning IncorporatedInventors: Douglas Clippinger Allan, Adam James Ellison, John Christopher Mauro
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Patent number: 8561429Abstract: A strengthened glass that does not exhibit frangible behavior when subjected to impact or contact forces, and a method of strengthening a glass. The glass may be strengthened by subjecting it to multiple, successive, ion exchange treatments. The multiple ion exchange treatments provide a local compressive stress maximum at a depth of the strengthened layer and a second local maximum at or near (e.g., within 10 ?m) the surface of the glass.Type: GrantFiled: July 10, 2009Date of Patent: October 22, 2013Assignee: Corning IncorporatedInventors: Douglas Clippinger Allan, Adam James Ellison, Sinue Gomez