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).
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Patent number: 9809717Abstract: 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: GrantFiled: May 25, 2011Date of Patent: November 7, 2017Assignee: 3M Innovative Properties CompanyInventors: Mahfuza B. Ali, Naiyong Jing, Valeri Lirine, Pradnya V. Nagarkar, Caroline M. Ylitalo, Nancy S. Lennhoff, Matthew T. Scholz, Ranjani V. Parthasarathy
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Patent number: 9782955Abstract: 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: GrantFiled: August 13, 2014Date of Patent: October 10, 2017Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Michael W. Dolezal, Robert R. Kieschke, Ta-Hua Yu, Mark A. Roehrig, Pradnya V. Nagarkar, Matthew S. Stay, Shawn C. Dodds, Bernard O. Geaghan
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Patent number: 9557827Abstract: 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: GrantFiled: May 28, 2015Date of Patent: January 31, 2017Assignee: 3M Innovative Properties CompanyInventors: Bernard O. Geaghan, Michael Benton Free, Edward S. Hagermoser, Rachael P. Marino, Pradnya V. Nagarkar, Martin B. Wolk
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Publication number: 20160200086Abstract: 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: ApplicationFiled: August 13, 2014Publication date: July 14, 2016Inventors: Michael W. Dolezal, Robert R. Kieschke, Ta-Hua Yu, Mark A. Roehrig, Pradnya V. Nagarkar, Matthew S. Stay, Shawn C. Dodds, Bernard O. Geaghan
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Publication number: 20150261317Abstract: 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: ApplicationFiled: May 28, 2015Publication date: September 17, 2015Inventors: Bernard O. Geaghan, Michael Benton Free, Edward S. Hagermoser, Rachael P. Marino, Pradnya V. Nagarkar, Martin B. Wolk
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Patent number: 9068845Abstract: 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: GrantFiled: December 13, 2012Date of Patent: June 30, 2015Assignee: 3M Innovative Properties CompanyInventors: Bernard O. Geaghan, Michael Benton Free, Edward S. Hagermoser, Rachael P. Marino, Pradnya V. Nagarkar, Martin B. Wolk
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Publication number: 20150024019Abstract: 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: ApplicationFiled: May 25, 2011Publication date: January 22, 2015Inventors: Mahfuza B. Ali, Naiyong Jing, Valeri Lirine, Pradnya V. Nagarkar, Caroline M. Ylitalo, Nancy S. Lennhoff, Matthew T. Scholz, Ranjani V. Parthasarathy
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Publication number: 20130220682Abstract: 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: ApplicationFiled: October 28, 2011Publication date: August 29, 2013Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: Suresh S. Iyer, Yu Yang, Mark J. Pellerite, Pradnya V. Nagarkar
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Publication number: 20120015002Abstract: 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: ApplicationFiled: May 25, 2011Publication date: January 19, 2012Inventors: Mahfuza B. Ali, Naiyong Jing, Valeri Lirine, Pradnya V. Nagarkar, Caroline M. Ylitalo, Nancy S. Lennhoff
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Publication number: 20120015200Abstract: 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: ApplicationFiled: May 25, 2011Publication date: January 19, 2012Inventors: Mahfuza B. Ali, Naiyong Jing, Valeri Lirine, Pradnya V. Nagarkar, Caroline M. Ylitalo, Nancy S. Lennhoff
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Patent number: 7846541Abstract: 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: GrantFiled: November 2, 2007Date of Patent: December 7, 2010Assignee: Seiko Epson CorporationInventors: Xuequn Hu, Pradnya V. Nagarkar, Gerald N. Nkwantah, Michael K. Gerlach, James P. DiZio, Gregg S. Cannavo
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Patent number: 7717564Abstract: 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: GrantFiled: May 21, 2008Date of Patent: May 18, 2010Assignee: Seiko Epson CorporationInventors: Philip J. Ralli, Pradnya V. Nagarkar, James N. Gordon, Ikuko Ebihara, Charles L. Bruzzone, Giorgio B. Trapani
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Patent number: 7643211Abstract: 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: GrantFiled: December 19, 2008Date of Patent: January 5, 2010Assignee: Seiko Epson CorporationInventors: Michael K. Gerlach, Gerald N. Nkwantah, Jonathan M. Mack, Pradnya V. Nagarkar, Philip J. Ralli
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Patent number: 7573637Abstract: 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: GrantFiled: August 3, 2004Date of Patent: August 11, 2009Assignee: Seiko Epson CorporationInventors: Michael K. Gerlach, Gerald N. Nkwantah, Jonathan M. Mack, Pradnya V. Nagarkar, Philip J. Ralli
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Publication number: 20090163686Abstract: 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: ApplicationFiled: December 20, 2007Publication date: June 25, 2009Inventors: Michael K. Gerlach, Gerald N. Nkwantah, Giorgio B. Trapani, Pradnya V. Nagarkar, Phillip J. Ralli
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Publication number: 20090134535Abstract: 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: ApplicationFiled: December 19, 2008Publication date: May 28, 2009Applicant: SEIKO EPSON CORPORATIONInventors: Michael K. Gerlach, Gerald N. Nkwantah, Jonathan M. Mack, Pradnya V. Nagarkar, Philip J. Ralli
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Publication number: 20090135482Abstract: 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: ApplicationFiled: December 19, 2008Publication date: May 28, 2009Applicant: SEIKO EPSON CORPORATIONInventors: Michael K. Gerlach, Gerald N. Nkwantah, Jonathan M. Mack, Pradnya V. Nagarkar, Philip J. Ralli
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Publication number: 20090117378Abstract: 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: ApplicationFiled: November 2, 2007Publication date: May 7, 2009Inventors: Xuequn Hu, Pradnya V. Nagarkar, Gerald N. Nkwantah, Michael K. Gerlach, James P. Dizio, Gregg S. Cannavo
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Publication number: 20080218698Abstract: 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: ApplicationFiled: May 21, 2008Publication date: September 11, 2008Inventors: PHILIP J. RALLI, Pradnya V. Nagarkar, James N. Gordon, Ikuko Ebihara, Charles L. Bruzzone, Giorgio B. Trapani
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Patent number: 7391569Abstract: 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: GrantFiled: May 18, 2005Date of Patent: June 24, 2008Assignee: 3M Innovative Properties CompanyInventors: Philip J. Ralli, Pradnya V. Nagarkar, James N. Gordon, Ikuko Ebihara, Charles L. Bruzzone, Giorgio B. Trapani