Patents by Inventor Pratima Gattu Naga Rao

Pratima Gattu Naga Rao 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: 10710367
    Abstract: The present teachings describe a printhead assembly. The printhead assembly includes a first plate and a second plate stacked together. The printhead assembly includes a first adhesive between the first plate and the second plate for bonding the plates together. The printhead assembly includes a second adhesive surrounding an outer edge of the first adhesive wherein the second adhesive has an oxygen migration rate lower than an oxygen migration rate of the first adhesive. An oxygen sensitive component is contained within the outer edge of the first adhesive.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: July 14, 2020
    Assignee: Xerox Corporation
    Inventors: Pratima Gattu Naga Rao, Sean Campbell Hunter, Christopher Jon Laharty, Jonathan Robert Brick, John Milton Brookfield, Tony Russell Rogers, Michael Joel Edwards, Hong Zhao, Mandakini Kanungo, Yanjia Zuo, Daniel R. Hahn, Santokh S. Badesha, John R. Andrews
  • Publication number: 20190240977
    Abstract: The present teachings describe a printhead assembly. The printhead assembly includes a first plate and a second plate stacked together. The printhead assembly includes a first adhesive between the first plate and the second plate for bonding the plates together. The printhead assembly includes a second adhesive surrounding an outer edge of the first adhesive wherein the second adhesive has an oxygen migration rate lower than an oxygen migration rate of the first adhesive. An oxygen sensitive component is contained within the outer edge of the first adhesive.
    Type: Application
    Filed: April 22, 2019
    Publication date: August 8, 2019
    Inventors: Pratima Gattu Naga Rao, Sean Campbell Hunter, Christopher Jon Laharty, Jonathan Robert Brick, John Milton Brookfield, Tony Russell Rogers, Michael Joel Edwards, Hong Zhao, Mandakini Kanungo, Yanjia Zuo, Daniel R. Hahn, Santokh S. Badesha, John R. Andrews
  • Patent number: 10322583
    Abstract: The present teachings describe a printhead assembly. The printhead assembly includes a first plate and a second plate stacked together. The printhead assembly includes a first adhesive between the first plate and the second plate for bonding the plates together. The printhead assembly includes a second adhesive surrounding an outer edge of the first adhesive wherein the second adhesive has an oxygen migration rate lower than an oxygen migration rate of the first adhesive. An oxygen sensitive component is contained within the outer edge of the first adhesive.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: June 18, 2019
    Assignee: Xerox Corporation
    Inventors: Pratima Gattu Naga Rao, Sean Campbell Hunter, Christopher Jon Laharty, Jonathan Robert Brick, John Milton Brookfield, Tony Russell Rogers, Michael Joel Edwards, Hong Zhao, Mandakini Kanungo, Yanjia Zuo, Daniel R. Hahn, Santokh S. Badesha, John R. Andrews
  • Patent number: 10150898
    Abstract: An adhesive compound can include an uncured epoxy film having a curing temperature between about 80° C. and about 300° C. The uncured epoxy film can include a cresol novolac epoxy resin and a bisphenol A epoxy resin. The uncured epoxy film can have a thickness between about 0.1 mil and about 5 mil.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: December 11, 2018
    Assignee: XEROX CORPORATION
    Inventors: Yanjia Zuo, Mandakini Kanungo, Hong Zhao, John R. Andrews, Pratima Gattu Naga Rao, Mark A. Cellura, Santokh S. Badesha
  • Patent number: 10052874
    Abstract: A method for forming an ink jet printhead comprises processing an epoxy adhesive such that negative effects from physical contact with particular inks are reduced or eliminated. Conventional adhesives processed using conventional techniques are known to gain weight and squeeze out when exposed to certain inks such as ultraviolet inks, solid inks, and aqueous inks. An embodiment of the present teachings can include processing of a particular adhesive such that the resulting epoxy adhesive is suitable for printhead applications.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: August 21, 2018
    Assignee: XEROX CORPORATION
    Inventors: Yanjia Zuo, Mandakini Kanungo, Hong Zhao, Pratima Gattu Naga Rao, Mark A. Cellura, Santokh S. Badesha, John R. Andrews
  • Patent number: 9890306
    Abstract: An adhesive compound can include an uncured epoxy film having a curing temperature between about 80° C. and about 300° C. The uncured epoxy film can include a cresol novolac resin and a bisphenol A epoxy resin. The uncured epoxy film can have a thickness between about 0.1 mil and about 5 mil.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: February 13, 2018
    Assignee: XEROX CORPORATION
    Inventors: Yanjia Zuo, Mandakini Kanungo, Hong Zhao, John R. Andrews, Pratima Gattu Naga Rao, Mark A. Cellura, Santokh S. Badesha
  • Publication number: 20170129240
    Abstract: A method for forming an ink jet printhead comprises processing an epoxy adhesive such that negative effects from physical contact with particular inks are reduced or eliminated. Conventional adhesives processed using conventional techniques are known to gain weight and squeeze out when exposed to certain inks such as ultraviolet inks, solid inks, and aqueous inks. An embodiment of the present teachings can include processing of a particular adhesive such that the resulting epoxy adhesive is suitable for printhead applications.
    Type: Application
    Filed: January 19, 2017
    Publication date: May 11, 2017
    Applicant: XEROX CORPORATION
    Inventors: Yanjia Zuo, Mandakini Kanungo, Hong Zhao, Pratima Gattu Naga Rao, Mark A. Cellura, Santokh S. Badesha, John R. Andrews
  • Patent number: 9623660
    Abstract: A method for forming an ink jet printhead comprises processing an epoxy adhesive such that negative effects from physical contact with particular inks are reduced or eliminated. Conventional adhesives processed using conventional techniques are known to gain weight and squeeze out when exposed to certain inks such as ultraviolet inks, solid inks, and aqueous inks. An embodiment of the present teachings can include processing of a particular adhesive such that the resulting epoxy adhesive is suitable for printhead applications.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: April 18, 2017
    Assignee: Xerox Corporation
    Inventors: Yanjia Zuo, Mandakini Kanungo, Hong Zhao, Pratima Gattu Naga Rao, Mark A. Cellura, Santokh S. Badesha, John R. Andrews
  • Publication number: 20160332445
    Abstract: The present teachings describe a printhead assembly. The printhead assembly includes a first plate and a second plate stacked together. The printhead assembly includes a first adhesive between the first plate and the second plate for bonding the plates together. The printhead assembly includes a second adhesive surrounding an outer edge of the first adhesive wherein the second adhesive has an oxygen migration rate lower than an oxygen migration rate of the first adhesive. An oxygen sensitive component is contained within the outer edge of the first adhesive.
    Type: Application
    Filed: July 28, 2016
    Publication date: November 17, 2016
    Inventors: Pratima Gattu Naga Rao, Sean Campbell Hunter, Christopher Jon Laharty, Jonathan Robert Brick, John Milton Brookfield, Tony Russell Rogers, Michael Joel Edwards, Hong Zhao, Mandakini Kanungo, Yanjia Zuo, Daniel R. Hahn, Santokh S. Badesha, John R. Andrews
  • Publication number: 20160257865
    Abstract: An adhesive compound can include an uncured epoxy film having a curing temperature between about 80° C. and about 300° C. The uncured epoxy film can include a cresol novolac epoxy resin and a bisphenol A epoxy resin. The uncured epoxy film can have a thickness between about 0.1 mil and about 5 mil.
    Type: Application
    Filed: May 12, 2016
    Publication date: September 8, 2016
    Inventors: Yanjia Zuo, Mandakini Kanungo, Hong Zhao, John R. Andrews, Pratima Gattu Naga Rao, Mark A. Cellura, Santokh S. Badesha
  • Patent number: 9427969
    Abstract: The present teachings describe a printhead assembly. The printhead assembly includes a first plate and a second plate stacked together. The printhead assembly includes a first adhesive between the first plate and the second plate for bonding the plates together. The printhead assembly includes a second adhesive surrounding an outer edge of the first adhesive wherein the second adhesive has an oxygen migration rate lower than an oxygen migration rate of the first adhesive. An oxygen sensitive component is contained within the outer edge of the first adhesive.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: August 30, 2016
    Assignee: Xerox Corporation
    Inventors: Pratima Gattu Naga Rao, Sean Campbell Hunter, Christopher Jon Laharty, Jonathan Robert Brick, John Milton Brookfield, Tony Russell Rogers, Michael Joel Edwards, Hong Zhao, Mandakini Kanungo, Yanjia Zuo, Daniel R. Hahn, Santokh S. Badesha, John R. Andrews
  • Patent number: 9206341
    Abstract: The disclosure provides a solvent system for dissolving an epoxy adhesive such as I2300L epoxy adhesive. The solvent system includes a dialkyl ether solvent and an alkyl alcohol solvent. The disclosure also provides methods for preparing a uniform thin film deposit of an epoxy adhesive for printhead interstitial bonding during their fabrication.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: December 8, 2015
    Assignee: XEROX CORPORATION
    Inventors: Yanjia Zuo, Mandakini Kanungo, Pratima Gattu Naga Rao, Santokh Badesha, John R. Andrews
  • Publication number: 20150344750
    Abstract: An adhesive compound can include an uncured epoxy film having a curing temperature between about 80° C. and about 300° C. The uncured epoxy film can include a cresol novolac resin and a bisphenol A epoxy resin. The uncured epoxy film can have a thickness between about 0.1 mil and about 5 mil.
    Type: Application
    Filed: May 28, 2014
    Publication date: December 3, 2015
    Applicant: XEROX CORPORATION
    Inventors: YANJIA ZUO, MANDAKINI KANUNGO, HONG ZHAO, JOHN R. ANDREWS, PRATIMA GATTU NAGA RAO, MARK A. CELLURA, SANTOKH S. BADESHA
  • Publication number: 20150291860
    Abstract: The disclosure provides a solvent system for dissolving an epoxy adhesive such as I2300L epoxy adhesive. The solvent system includes a dialkyl ether solvent and an alkyl alcohol solvent. The disclosure also provides methods for preparing a uniform thin film deposit of an epoxy adhesive for printhead interstitial bonding during their fabrication.
    Type: Application
    Filed: April 15, 2014
    Publication date: October 15, 2015
    Applicant: XEROX CORPORATION
    Inventors: Yanjia Zuo, Mandakini Kanungo, Pratima Gattu Naga Rao, Santokh Badesha, John R. Andrews
  • Publication number: 20150158298
    Abstract: The present teachings describe a printhead assembly. The printhead assembly includes a first plate and a second plate stacked together. The printhead assembly includes a first adhesive between the first plate and the second plate for bonding the plates together. The printhead assembly includes a second adhesive surrounding an outer edge of the first adhesive wherein the second adhesive has an oxygen migration rate lower than an oxygen migration rate of the first adhesive. An oxygen sensitive component is contained within the outer edge of the first adhesive.
    Type: Application
    Filed: December 6, 2013
    Publication date: June 11, 2015
    Applicant: XEROX CORPORATION
    Inventors: Pratima Gattu Naga Rao, Sean Campbell Hunter, Christopher Jon Laharty, Jonathan Robert Brick, John Milton Brookfield, Tony Russell Rogers, Michael Joel Edwards, Hong Zhao, Mandakini Kanungo, Yanjia Zuo, Daniel R. Hahn, Santokh S. Badesha, John R. Andrews
  • Patent number: 9004648
    Abstract: Inkjet printheads containing a first plate, a second plate, and a cured adhesive composition disposed between and bonding the first plate and the second plate. The cured adhesive composition has a glass transition temperature of greater than about 115° C. and is stable when exposed to acrylate monomer. Also, inkjet printheads having a first plate, a second plate, and a cured thin film adhesive disposed between and bonding to both of the first plate and the second plate. The cured thin film adhesive contains a polyimide film disposed between a cured first adhesive layer and a cured second adhesive layer. Methods of preparing such inkjet printheads.
    Type: Grant
    Filed: August 1, 2013
    Date of Patent: April 14, 2015
    Assignee: Xerox Corporation
    Inventors: Yanjia Zuo, John R. Andrews, Pratima Gattu Naga Rao, Mandakini Kanungo, Hong Zhao, Santokh S. Badesha
  • Publication number: 20150035903
    Abstract: Inkjet printheads containing a first plate, a second plate, and a cured adhesive composition disposed between and bonding the first plate and the second plate. The cured adhesive composition has a glass transition temperature of greater than about 115° C. and is stable when exposed to acrylate monomer. Also, inkjet printheads having a first plate, a second plate, and a cured thin film adhesive disposed between and bonding to both of the first plate and the second plate. The cured thin film adhesive contains a polyimide film disposed between a cured first adhesive layer and a cured second adhesive layer. Methods of preparing such inkjet printheads.
    Type: Application
    Filed: August 1, 2013
    Publication date: February 5, 2015
    Applicant: XEROX CORPORATION
    Inventors: Yanjia Zuo, John R. Andrews, Pratima Gattu Naga Rao, Mandakini Kanungo, Hong Zhao, Santokh S. Badesha
  • Publication number: 20140342160
    Abstract: A method for forming an ink jet printhead comprises processing an epoxy adhesive such that negative effects from physical contact with particular inks are reduced or eliminated. Conventional adhesives processed using conventional techniques are known to gain weight and squeeze out when exposed to certain inks such as ultraviolet inks, solid inks, and aqueous inks. An embodiment of the present teachings can include processing of a particular adhesive such that the resulting epoxy adhesive is suitable for printhead applications.
    Type: Application
    Filed: April 29, 2014
    Publication date: November 20, 2014
    Applicant: Xerox Corporation
    Inventors: Yanjia Zuo, Mandakini Kanungo, Hong Zhao, Pratima Gattu Naga Rao, Mark A. Cellura, Santokh S. Badesha, John R. Andrews
  • Publication number: 20140292930
    Abstract: A method for forming an ink jet printhead comprises processing an epoxy adhesive such that negative effects from physical contact with particular inks are reduced or eliminated. Conventional adhesives processed using conventional techniques are known to gain weight, swell, and/or oxidize when exposed to certain inks such as ultraviolet inks and pigmented inks. An embodiment of the present teachings can include processing of an adhesive including a processes a particular adhesive comprising a cresol novolac resin and a dicydiandiamide curing agent using a particular process, such that the resulting epoxy adhesive is suitable for printhead applications.
    Type: Application
    Filed: April 1, 2013
    Publication date: October 2, 2014
    Applicant: XEROX CORPORATION
    Inventors: Yanjia Zuo, Pratima Gattu Naga Rao, Mandakini Kanungo, Hong Zhao, Mark A. Cellura, Robertha Caroline Howell, Santokh S. Badesha, John R. Andrews