Patents by Inventor Pradnya V. Nagarkar

Pradnya V. Nagarkar 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: 9809717
    Abstract: The disclosure provides polymers having antimicrobial activity and articles with the polymers coated thereon. The polymers include a first pendant group comprising a first cationic component, a second pendant group comprising a nonpolar component, and a third pendant group comprising an organosilane component. The disclosure also includes methods of coating medical device articles and body fluid-receiving substrates with the antimicrobial polymers. The methods further include the use of adhesion-promoting components.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: November 7, 2017
    Assignee: 3M Innovative Properties Company
    Inventors: Mahfuza B. Ali, Naiyong Jing, Valeri Lirine, Pradnya V. Nagarkar, Caroline M. Ylitalo, Nancy S. Lennhoff, Matthew T. Scholz, Ranjani V. Parthasarathy
  • Patent number: 9782955
    Abstract: Touch sensor layer constructions and methods of making such constructions are described. More particularly, touch sensor constructions that utilize patterned conductive layers that may be applied by a sacrificial release liner, eliminating one or more glass and/or film substrate from touch sensor stacks, and methods of making such constructions are described.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: October 10, 2017
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Michael W. Dolezal, Robert R. Kieschke, Ta-Hua Yu, Mark A. Roehrig, Pradnya V. Nagarkar, Matthew S. Stay, Shawn C. Dodds, Bernard O. Geaghan
  • Patent number: 9557827
    Abstract: A digitizer system including a substrate having a position-unique photoluminescent indicia pattern. A stylus component receives optical signals indicative of the indicia pattern and determines therefrom the position of the stylus relative to the substrate. Methods of disposing indicia on the substrate, and styli suitable for sensing photoluminescent indicia are also described.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: January 31, 2017
    Assignee: 3M Innovative Properties Company
    Inventors: Bernard O. Geaghan, Michael Benton Free, Edward S. Hagermoser, Rachael P. Marino, Pradnya V. Nagarkar, Martin B. Wolk
  • Publication number: 20160200086
    Abstract: Touch sensor layer constructions and methods of making such constructions are described. More particularly, touch sensor constructions that utilize patterned conductive layers that may be applied by a sacrificial release liner, eliminating one or more glass and/or film substrate from touch sensor stacks, and methods of making such constructions are described.
    Type: Application
    Filed: August 13, 2014
    Publication date: July 14, 2016
    Inventors: Michael W. Dolezal, Robert R. Kieschke, Ta-Hua Yu, Mark A. Roehrig, Pradnya V. Nagarkar, Matthew S. Stay, Shawn C. Dodds, Bernard O. Geaghan
  • Publication number: 20150261317
    Abstract: A digitizer system including a substrate having a position-unique photoluminescent indicia pattern. A stylus component receives optical signals indicative of the indicia pattern and determines therefrom the position of the stylus relative to the substrate. Methods of disposing indicia on the substrate, and styli suitable for sensing photoluminescent indicia are also described.
    Type: Application
    Filed: May 28, 2015
    Publication date: September 17, 2015
    Inventors: Bernard O. Geaghan, Michael Benton Free, Edward S. Hagermoser, Rachael P. Marino, Pradnya V. Nagarkar, Martin B. Wolk
  • Patent number: 9068845
    Abstract: A digitizer system including a substrate having a position-unique photoluminescent indicia pattern. A stylus component receives optical signals indicative of the indicia pattern and determines therefrom the position of the stylus relative to the substrate. Methods of disposing indicia on the substrate, and styli suitable for sensing photoluminescent indicia are also described.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: June 30, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Bernard O. Geaghan, Michael Benton Free, Edward S. Hagermoser, Rachael P. Marino, Pradnya V. Nagarkar, Martin B. Wolk
  • Publication number: 20150024019
    Abstract: The disclosure provides polymers having antimicrobial activity and articles with the polymers coated thereon. The polymers include a first pendant group comprising a first cationic component, a second pendant group comprising a nonpolar component, and a third pendant group comprising an organosilane component. The disclosure also includes methods of coating medical device articles and body fluid-receiving substrates with the antimicrobial polymers. The methods further include the use of adhesion-promoting components.
    Type: Application
    Filed: May 25, 2011
    Publication date: January 22, 2015
    Inventors: Mahfuza B. Ali, Naiyong Jing, Valeri Lirine, Pradnya V. Nagarkar, Caroline M. Ylitalo, Nancy S. Lennhoff, Matthew T. Scholz, Ranjani V. Parthasarathy
  • Publication number: 20130220682
    Abstract: A method includes: providing a silver-containing conductive member disposed on a portion of a surface of chemically-strengthened glass, wherein the conductive member comprises silver; disposing a layer comprising a curable polysilazane onto at least a portion of the conductive member and at least a portion of the surface of the chemically-strengthened glass adjacent to the conductive member; and curing the curable polysilazane. Electronic devices prepared according to the method are also disclosed.
    Type: Application
    Filed: October 28, 2011
    Publication date: August 29, 2013
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Suresh S. Iyer, Yu Yang, Mark J. Pellerite, Pradnya V. Nagarkar
  • Publication number: 20120015002
    Abstract: The disclosure provides polymers having antimicrobial activity and articles with the polymers coated thereon. The polymers include a first pendant group comprising a first quaternary ammonium component, a second pendant group comprising a nonpolar component, and a third pendant group comprising an organosilane component. The disclosure also includes methods of coating articles with the antimicrobial polymers. The methods further include the use of adhesion-promoting reagents.
    Type: Application
    Filed: May 25, 2011
    Publication date: January 19, 2012
    Inventors: Mahfuza B. Ali, Naiyong Jing, Valeri Lirine, Pradnya V. Nagarkar, Caroline M. Ylitalo, Nancy S. Lennhoff
  • Publication number: 20120015200
    Abstract: The disclosure provides siliceous substrates with the antimicrobial compositions coated thereon. The disclosure also includes methods of coating articles with the antimicrobial compositions. The methods include heat treating the siliceous substrate not more than four hours prior to contacting the antimicrobial composition with the heat-treated substrate.
    Type: Application
    Filed: May 25, 2011
    Publication date: January 19, 2012
    Inventors: Mahfuza B. Ali, Naiyong Jing, Valeri Lirine, Pradnya V. Nagarkar, Caroline M. Ylitalo, Nancy S. Lennhoff
  • Patent number: 7846541
    Abstract: An optical element includes a polarizer having oriented vinylene segments; a substrate; and an adhesive layer disposed between the polarizer and the substrate, the adhesive layer comprising aliphatic urethane(meth)acrylate oligomer, (meth)acryl monomer, silane, and crosslinker, the crosslinker comprising ethylene glycol diacrylate and/or pentaerythritol triacrylate. The optical element can have additional layers such as hardcoat layers, additional adhesive layers, and/or additional substrates. A method of making the optical element is also disclosed, as are optical devices including the optical element.
    Type: Grant
    Filed: November 2, 2007
    Date of Patent: December 7, 2010
    Assignee: Seiko Epson Corporation
    Inventors: Xuequn Hu, Pradnya V. Nagarkar, Gerald N. Nkwantah, Michael K. Gerlach, James P. DiZio, Gregg S. Cannavo
  • Patent number: 7717564
    Abstract: A projection system includes a light source producing illumination light, an imager disposed to receive the illumination light, and a projection lens disposed to receive the illumination light from the imager. The imager includes an intrinsic polarizer. The intrinsic polarizer can be an intrinsic polarizer stack including a U.V. curable adhesive.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: May 18, 2010
    Assignee: Seiko Epson Corporation
    Inventors: Philip J. Ralli, Pradnya V. Nagarkar, James N. Gordon, Ikuko Ebihara, Charles L. Bruzzone, Giorgio B. Trapani
  • Patent number: 7643211
    Abstract: An intrinsic polarizer, including a sheet of PVA-type matrix that includes vinylene polymer blocks, the sheet defining a pass polarization axis and a block polarization axis perpendicular to the pass polarization axis, light having an electrical vector parallel to the pass polarization axis being substantially transmitted through the sheet and light having an electrical vector parallel to the block polarization axis being substantially absorbed by the vinylene blocks, the sheet exhibiting a dichroic ratio of more than 100.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: January 5, 2010
    Assignee: Seiko Epson Corporation
    Inventors: Michael K. Gerlach, Gerald N. Nkwantah, Jonathan M. Mack, Pradnya V. Nagarkar, Philip J. Ralli
  • Patent number: 7573637
    Abstract: An improved method of forming an intrinsic polarizer, referred to as a K-type polarizer, includes stretching a polymeric film a first stretching step. The polymeric film comprises a hydroxylated linear polymer which is converted after the first stretching step to form dichroic, copolymer polyvinylene blocks aligned in the polymeric film. The polymeric film is stretched in a second stretching step while converting the hydroxylated linear polymer. This method produces an improved K-type polarizer with excellent polarizing and color characteristics. For example, the dichroic ratio is higher than 100, the color shift for light passed through the polarizer in a crossed configuration is low, and the absorption of light in the blue region of the visible spectrum is more than one half of the absorption for light in the middle of the visible spectrum.
    Type: Grant
    Filed: August 3, 2004
    Date of Patent: August 11, 2009
    Assignee: Seiko Epson Corporation
    Inventors: Michael K. Gerlach, Gerald N. Nkwantah, Jonathan M. Mack, Pradnya V. Nagarkar, Philip J. Ralli
  • Publication number: 20090163686
    Abstract: An integrated wet stretch method of making an intrinsic polarizer includes the following steps in order: providing a polymeric film comprising poly(vinyl alcohol) and having an original length; immersing the polymeric film in a first bath comprising a first solution having a pH of less than about 3; uniaxially stretching the first polymeric film in the machine direction thereby forming a stretched polymeric film; removing the stretched polymeric film from the first bath; removing excess first solution from the stretched polymeric film; and uniaxially stretching the stretched polymeric film in the machine direction, at a temperature of at least about 120° C., thereby forming a further stretched polymeric film.
    Type: Application
    Filed: December 20, 2007
    Publication date: June 25, 2009
    Inventors: Michael K. Gerlach, Gerald N. Nkwantah, Giorgio B. Trapani, Pradnya V. Nagarkar, Phillip J. Ralli
  • Publication number: 20090134535
    Abstract: An improved method of forming an intrinsic polarizer, referred to as a K-type polarizer, includes stretching a polymeric film a first stretching step. The polymeric film comprises a hydroxylated linear polymer which is converted after the first stretching step to form dichroic, copolymer polyvinylene blocks aligned in the polymeric film. The polymeric film is stretched in a second stretching step while converting the hydroxylated linear polymer. This method produces an improved K-type polarizer with excellent polarizing and color characteristics. For example, the dichroic ratio is higher than 100, the color shift for light passed through the polarizer in a crossed configuration is low, and the absorption of light in the blue region of the visible spectrum is more than one half of the absorption for light in the middle of the visible spectrum.
    Type: Application
    Filed: December 19, 2008
    Publication date: May 28, 2009
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Michael K. Gerlach, Gerald N. Nkwantah, Jonathan M. Mack, Pradnya V. Nagarkar, Philip J. Ralli
  • Publication number: 20090135482
    Abstract: An intrinsic polarizer, including a sheet of PVA-type matrix that includes vinylene polymer blocks, the sheet defining a pass polarization axis and a block polarization axis perpendicular to the pass polarization axis, light having an electrical vector parallel to the pass polarization axis being substantially transmitted through the sheet and light having an electrical vector parallel to the block polarization axis being substantially absorbed by the vinylene blocks, the sheet exhibiting a dichroic ratio of more than 100.
    Type: Application
    Filed: December 19, 2008
    Publication date: May 28, 2009
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Michael K. Gerlach, Gerald N. Nkwantah, Jonathan M. Mack, Pradnya V. Nagarkar, Philip J. Ralli
  • Publication number: 20090117378
    Abstract: An optical element includes a polarizer having oriented vinylene segments; a substrate; and an adhesive layer disposed between the polarizer and the substrate, the adhesive layer comprising aliphatic urethane(meth)acrylate oligomer, (meth)acryl monomer, silane, and crosslinker, the crosslinker comprising ethylene glycol diacrylate and/or pentaerythritol triacrylate. The optical element can have additional layers such as hardcoat layers, additional adhesive layers, and/or additional substrates. A method of making the optical element is also disclosed, as are optical devices including the optical element.
    Type: Application
    Filed: November 2, 2007
    Publication date: May 7, 2009
    Inventors: Xuequn Hu, Pradnya V. Nagarkar, Gerald N. Nkwantah, Michael K. Gerlach, James P. Dizio, Gregg S. Cannavo
  • Publication number: 20080218698
    Abstract: A projection system including an intrinsic polarizer is disclosed. The projection system includes a light source producing illumination light, an imager disposed to receive the illumination light, and a projection lens disposed to receive the illumination light from the imager. The imager includes an intrinsic polarizer. An intrinsic polarizer stack including a U.V. curable adhesive is also disclosed.
    Type: Application
    Filed: May 21, 2008
    Publication date: September 11, 2008
    Inventors: PHILIP J. RALLI, Pradnya V. Nagarkar, James N. Gordon, Ikuko Ebihara, Charles L. Bruzzone, Giorgio B. Trapani
  • Patent number: 7391569
    Abstract: A projection system including an intrinsic polarizer is disclosed. The projection system includes a light source producing illumination light, an imager disposed to receive the illumination light, and a projection lens disposed to receive the illumination light from the imager. The imager includes an intrinsic polarizer. An intrinsic polarizer stack including a U.V. curable adhesive is also disclosed.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: June 24, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Philip J. Ralli, Pradnya V. Nagarkar, James N. Gordon, Ikuko Ebihara, Charles L. Bruzzone, Giorgio B. Trapani