Patents by Inventor Sandeep K. Bangaru

Sandeep K. Bangaru 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: 9776430
    Abstract: A post-printing treatment for printed media includes a wax suspended in water. Particles of the wax to lie upon at least an inkjet ink image on the printed media to facilitate abrasion resistance of the image.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: October 3, 2017
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jason Swei, Xi Zeng, Tao Chen, Sandeep K Bangaru, Eric L Burch
  • Patent number: 9421809
    Abstract: The present disclosure provides pre-treatment coatings, media substrates, and related methods. As such, a pre-treatment coating can include an evaporable solvent, a matrix, and a wax. The matrix can include a binder and a fixer, and the wax can include wax particles dispersed within the matrix. At least a portion of the wax particles can have a particle size that is greater than a thickness of the matrix when the pre-treatment coating is applied to a media substrate at a basis weight from 0.5 gsm to 20 gsm and the evaporable solvent removed.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: August 23, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Bor-Jiunn Niu, Jason Swei, Haigang Chen, Sandeep K Bangaru
  • Publication number: 20150352877
    Abstract: The present disclosure provides pre-treatment coatings, media substrates, and related methods. As such, a pre-treatment coating can include an evaporable solvent, a matrix, and a wax. The matrix can include a binder and a fixer, and the wax can include wax particles dispersed within the matrix. At least a portion of the wax particles can have a particle size that is greater than a thickness of the matrix when the pre-treatment coating is applied to a media substrate at a basis weight from 0.5 gsm to 20 gsm and the evaporable solvent removed.
    Type: Application
    Filed: January 31, 2013
    Publication date: December 10, 2015
    Inventors: BOR-JIUNN NIU, JASON SWEI, HAIGANG CHEN, SANDEEP K. BANGARU
  • Publication number: 20150336400
    Abstract: A post-printing treatment for printed media includes a wax suspended in water. Particles of the wax to lie upon at least an inkjet ink image on the printed media to facilitate abrasion resistance of the image.
    Type: Application
    Filed: December 20, 2012
    Publication date: November 26, 2015
    Inventors: JASON SWEI, XI ZENG, TAO CHEN, SANDEEP K BANGARU, ERIC L BURCH
  • Patent number: 8900677
    Abstract: A print medium includes a first layer on at least one of a first side and a second side of a substrate and a second layer. The first layer consists essentially of at least 80% by dry weight of one or more particulate inorganic pigments (PIPs). A combination of a particle size and a coat weight of the first layer on the substrate yields an effective pore size of the first layer in a range of about 0.008 to about 0.5 microns. For two or more PIPs in the first layer, the average particle size of one of the PIPs differs by no more than about 50% from the average particle size of another of the PIPs. The second layer is on top of the first layer and includes a particulate inorganic pigment (PIP) having an average particle size of about 0.1 to about 2 microns.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: December 2, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jason Swei, Sandeep K Bangaru
  • Publication number: 20140154433
    Abstract: A print medium includes a first layer on at least one of a first side and a second side of a substrate and a second layer. The first layer consists essentially of at least 80% by dry weight of one or more particulate inorganic pigments (PIPs). A combination of a particle size and a coat weight of the first layer on the substrate yields an effective pore size of the first layer in a range of about 0.008 to about 0.5 microns. For two or more PIPs in the first layer, the average particle size of one of the PIPs differs by no more than about 50% from the average particle size of another of the PIPs. The second layer is on top of the first layer and includes a particulate inorganic pigment (PIP) having an average particle size of about 0.1 to about 2 microns.
    Type: Application
    Filed: July 21, 2011
    Publication date: June 5, 2014
    Inventors: Jason Swei, Sandeep K Bangaru
  • Patent number: 8709555
    Abstract: A media for digital high speed inkjet web press printing has a CD residual tensile energy absorption index greater than 300 J/Kg. The media includes a paper base having a MD/CD tensile stiffness index ratio of less than 2.0 and a tensile energy absorption index of greater than 500 J/Kg. The paper base includes a mixture of fibers having a softwood fiber to hardwood fiber ratio within a range of 3 to 7 to 7 to 1, an internal starch having a cationic starch to fiber ratio greater than 1.0%, and a filler within a range of about 1.0% to about 12.0% of paper base weight. The media further includes an image receiving coating on a side of the paper base.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: April 29, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Lokendra Pal, Jason Swei, Glenn T. Gentile, Sandeep K. Bangaru
  • Patent number: 8398233
    Abstract: An inkjet recording medium includes a substrate, a base layer disposed on the substrate, and an ink receiving layer disposed on the base layer. The ink receiving layer includes cationically-modified fumed silica having nanoparticles of alumina and/or silica mixed therein. The alumina nanoparticles have an individual particle size ranging from about 15 nm to about 50 nm, and the silica nanoparticles have an individual particle size ranging from about 5 nm to about 45 nm.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: March 19, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Bor-Jiunn Niu, Haigang Chen, Lokendra Pai, Sandeep K. Bangaru, Greg S. Smith, Ryan C. Terasaki
  • Publication number: 20120194625
    Abstract: An inkjet recording medium includes a substrate, a base layer disposed on the substrate, and an ink receiving layer disposed on the base layer. The ink receiving layer includes cationically-modified fumed silica having nanoparticles of alumina and/or silica mixed therein. The alumina nanoparticles have an individual particle size ranging from about 15 nm to about 50 nm, and the silica nanoparticles have an individual particle size ranging from about 5 nm to about 45 nm.
    Type: Application
    Filed: January 31, 2011
    Publication date: August 2, 2012
    Inventors: Bor-Jiunn Niu, Haigang Chen, Lokendra Pai, Sandeep K. Bangaru, Greg S. Smith, Ryan C. Terasaki
  • Publication number: 20070235119
    Abstract: An inkjet recording medium includes a substrate, a base layer, and a porous ink receiving layer. The base layer is established on at least one surface of the substrate, and the porous ink receiving layer is established on the base layer. The base layer includes calcined clay present in an amount ranging from about 25% to about 75% by dry weight.
    Type: Application
    Filed: March 15, 2007
    Publication date: October 11, 2007
    Inventors: Richard J. McManus, Silke Courtenay, Sandeep K. Bangaru, Steven L. Webb