Patents by Inventor Karkala Arun Kumar
Karkala Arun Kumar 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: 8262381Abstract: Mastering tools and systems and methods for forming a cell on the mastering tools are provided. An exemplary method includes emitting a first laser light pulse from a laser for a first predetermined time interval such that at least a portion of the first laser light pulse forms the cell on the mastering tool. The cell has an opening size within a range of 10-100 micrometers and an aspect ratio less than or equal to 1.25.Type: GrantFiled: June 22, 2006Date of Patent: September 11, 2012Assignee: Sabic Innovative Plastics IP B.V.Inventors: Adel F. Bastawros, Grant Hay, Karkala Arun Kumar, Phil M. Peters
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Patent number: 8222562Abstract: Mastering tools and systems and methods for forming a plurality of cells on the mastering tools are provided. In particular, the systems vary the geometry of the cells or the placement of the cells, or both, for forming a textured surface on a mastering tool.Type: GrantFiled: September 28, 2010Date of Patent: July 17, 2012Assignee: Sabic Innovative Plastics IP B.V.Inventors: Adel F. Bastawros, Grant Hay, Karkala Arun Kumar, Phil M. Peters
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Publication number: 20110011837Abstract: Mastering tools and systems and methods for forming a plurality of cells on the mastering tools are provided. In particular, the systems vary the geometry of the cells or the placement of the cells, or both, for forming a textured surface on a mastering tool.Type: ApplicationFiled: September 28, 2010Publication date: January 20, 2011Applicant: SABIC INNOVATIVE PLASTICS IP B.V.Inventors: Adel F. Bastawros, Grant Hay, Karkala Arun Kumar, Phil M. Peters
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Patent number: 7824747Abstract: A light diffusing film for a back light display is described. The light diffusing film includes a unitary film consisting essentially of polycarbonate and a uniformly dispersed anti-static material in an amount sufficient to impart anti-static properties to the film. The anti-static material may comprise a fluorinated phosphonium sulfonate. The film may additionally include at least one textured surface for the low scattering of light. Alternatively, the film may additionally include a uniformly dispersed acrylic bulk scattering additive of particles having a mean particle size of from about 3 to about 10 microns and present in an amount from about 2 to about 7 percent by weight percent for the high scattering of light.Type: GrantFiled: December 28, 2007Date of Patent: November 2, 2010Assignee: Sabic Innovative Plastics IP B.V.Inventors: Grant Hay, Kevin P. Capaldo, Gheorghe Cojocariu, Karkala Arun Kumar, Theodorus Lambertus Hoeks, Todd M. Loehr, John F. Graf, Nathan D. Hoffman, Scott Leslie, Anshu Ghosal, Philippe Schottland
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Patent number: 7807938Abstract: Mastering tools and systems and methods for forming a plurality of cells on the mastering tools are provided. In particular, the systems vary the geometry of the cells or the placement of the cells, or both, for forming a textured surface on a mastering tool.Type: GrantFiled: June 22, 2006Date of Patent: October 5, 2010Assignee: Sabic Innovative Plastics IP B.V.Inventors: Adel F. Bastawros, Grant Hay, Karkala Arun Kumar, Phil M. Peters
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Publication number: 20080131625Abstract: A light diffusing film for a back light display is described. The light diffusing film includes a unitary film consisting essentially of polycarbonate and a uniformly dispersed anti-static material in an amount sufficient to impart anti-static properties to the film. The anti-static material may comprise a fluorinated phosphonium sulfonate. The film may additionally include at least one textured surface for the low scattering of light. Alternatively, the film may additionally include a uniformly dispersed acrylic bulk scattering additive of particles having a mean particle size of from about 3 to about 10 microns and present in an amount from about 2 to about 7 percent by weight percent for the high scattering of light.Type: ApplicationFiled: December 28, 2007Publication date: June 5, 2008Inventors: Grant Hay, Kevin P. Capaldo, Gheorghe Cojocariu, Karkala Arun Kumar, Theodorus Lambertus Hoeks, Todd M. Loehr, John F. Graf, Nathan D. Hoffman, Scott Leslie, Anshu Ghosal, Philippe Schottland
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Patent number: 7369192Abstract: An embodiment of a method of making an optical film comprises heating the optical film comprising greater than or equal to 80 wt. % polycarbonate to a sufficient temperature to stretch the optical film, wherein the weight percent is based on a total weight of the optical film; and stretching the optical film. A resulting stretched optical film has a linear CTE measured in a direction parallel to a stretching direction of less than or equal to 50×10?6 cm/cm/° C.Type: GrantFiled: June 7, 2007Date of Patent: May 6, 2008Assignee: General Electric CompanyInventors: Nickey Ambrose, Grant Hay, Eugene David Herrmann, Karkala Arun Kumar, Philip Matthew Peters, Joe Riello
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Patent number: 7314652Abstract: A light diffusing film for a back light display is described. The light diffusing film includes a unitary film consisting essentially of polycarbonate and a uniformly dispersed anti-static material in an amount sufficient to impart anti-static properties to the film. The anti-static material may comprise a fluorinated phosphonium sulfonate. The film may additionally include at least one textured surface for the low scattering of light. Alternatively, the film may additionally include a uniformly dispersed acrylic bulk scattering additive of particles having a mean particle size of from about 3 to about 10 microns and present in an amount from about 2 to about 7 percent by weight percent for the high scattering of light.Type: GrantFiled: February 27, 2004Date of Patent: January 1, 2008Assignee: General Electric CompanyInventors: Grant Hay, Kevin P. Capaldo, Gheorghe Cojocariu, Karkala Arun Kumar, Theodorus Lambertus Hoeks, Todd M. Loehr, John F. Graf, Nathan D. Hoffman, Scott Leslie, Anshu Ghosal, Philippe Schottland
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Publication number: 20070297480Abstract: Mastering tools and systems and methods for forming a cell on the mastering tools are provided. An exemplary method includes emitting a first laser light pulse from a laser for a first predetermined time interval such that at least a portion of the first laser light pulse forms the cell on the mastering tool. The cell has an opening size within a range of 10-100 micrometers and an aspect ratio less than or equal to 1.25.Type: ApplicationFiled: June 22, 2006Publication date: December 27, 2007Inventors: Adel F. Bastawros, Grant Hay, Karkala Arun Kumar, Phil M. Peters
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Publication number: 20070297060Abstract: Mastering tools and systems and methods for forming a plurality of cells on the mastering tools are provided. In particular, the systems vary the geometry of the cells or the placement of the cells, or both, for forming a textured surface on a mastering tool.Type: ApplicationFiled: June 22, 2006Publication date: December 27, 2007Inventors: Adel F. Bastawros, Grant Hay, Karkala Arun Kumar, Phil M. Peters
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Publication number: 20070281129Abstract: In one embodiment, the diffuser film comprises a polymer composition, a first surface, and a second surface opposite the first surface. The diffuser film is capable of diffusing light. The diffuser film, without a coating, has a film haze of about 10% to about 80%, and has no visible mura defects under panel observation as determined with a backlight display having a center brightness of about 6,000 nit to about 6,300 nit.Type: ApplicationFiled: June 6, 2006Publication date: December 6, 2007Inventors: Chi Kwong Chan, Yaowen Bai, Jinghui Xu, Adel Bastawros, Karkala Arun Kumar
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Patent number: 7280170Abstract: A method of making an optical film comprises heating the optical film comprising greater than or equal to 80 wt. % polycarbonate to a sufficient temperature to stretch the optical film, wherein the weight percent is based on a total weight of the optical film; and stretching the optical film, wherein a resulting stretched optical film has a linear CTE measured in a direction parallel to a stretching direction of less than or equal to 50×10?6 cm/cm/° C.Type: GrantFiled: July 20, 2004Date of Patent: October 9, 2007Assignee: General Electric CompanyInventors: Nickey Ambrose, Grant Hay, Eugene David Herrmann, Karkala Arun Kumar, Philip Matthew Peters, Joe Riello
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Patent number: 7280277Abstract: A light collimating and diffusing film and a method for making the film are provided. The film includes a plastic layer having a first side and a second side opposite the first side and at least a first peripheral edge. The first side has a first textured surface, wherein between 7 to 20 percent of slope angles on the first textured surface proximate a first axis has a value between zero and five degrees. The first axis is substantially parallel to the first peripheral edge. The plastic layer collimates light propagating therethrough.Type: GrantFiled: May 8, 2006Date of Patent: October 9, 2007Assignee: General Electric CompanyInventors: Adel F. Bastawros, Kevin P. Capaldo, Ashwit Dias, John Graf, Emine Elif Gurel, Grant Hay, Marshall Gordon Jones, Karkala Arun Kumar, Steven Alfred Tysoe, Masako Yamada
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Patent number: 7092163Abstract: A light collimating and diffusing film and a method for making the film are provided. The film includes a plastic layer having a first side and a second side opposite the first side and at least a first peripheral edge. The first side has a first textured surface, wherein between 7 to 20 percent of slope angles on the first textured surface proximate a first axis has a value between zero and five degrees. The first axis is substantially parallel to the first peripheral edge. The plastic layer collimates light propagating therethrough.Type: GrantFiled: July 22, 2004Date of Patent: August 15, 2006Assignee: General Electric CompanyInventors: Adel F. Bastawros, Kevin P. Capaldo, Gheorghe Cojocariu, Ashwit Dias, John Graf, Emine Elif Gurel, Grant Hay, Marshall Gordon Jones, Karkala Arun Kumar, Todd Morris Loehr, Steven Alfred Tysoe, Masako Yamada
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Publication number: 20040228141Abstract: A light diffusing film for a back light display is described. The light diffusing film includes a unitary film consisting essentially of polycarbonate and a uniformly dispersed anti-static material in an amount sufficient to impart anti-static properties to the film. The anti-static material may comprise a fluorinated phosphonium sulfonate. The film may additionally include at least one textured surface for the low scattering of light. Alternatively, the film may additionally include a uniformly dispersed acrylic bulk scattering additive of particles having a mean particle size of from about 3 to about 10 microns and present in an amount from about 2 to about 7 percent by weight percent for the high scattering of light.Type: ApplicationFiled: February 27, 2004Publication date: November 18, 2004Applicant: GENERAL ELECTRIC COMPANYInventors: Grant Hay, Kevin P. Capaldo, Gheorghe Cojocariu, Karkala Arun Kumar, Theodorus Lambertus Hoeks, Todd M. Loehr, John F. Graf, Nathan D. Hoffman, Scott Leslie, Anshu Ghosal, Philippe Schottland