Patents by Inventor Robert F. Kamrath

Robert F. Kamrath 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: 9310527
    Abstract: Antireflective films are described comprising a light transmissive substrate and a low refractive index layer disposed on the light transmissive substrate. The low refractive index layer comprises the reaction product of polymerizable resin composition comprising at least 20 wt-% fumed silica. In one embodiment, the polymerizable resin is ethylenically unsaturated. In a favored embodiment, the low refractive index layer increases in porosity from the light transmissive substrate interface to an opposing porous surface.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: April 12, 2016
    Assignee: 3M Innovative Properties Company
    Inventors: Encai Hao, Jun-Ying Zhang, Robert F. Kamrath, Lan H. Liu, Ming Cheng, Jung-Sheng Wu, Mark J. Pellerite, Richard J. Pokorny, Suresh S. Iyer
  • Publication number: 20160087246
    Abstract: Methods of making transfer films to form bridged nanostructures are disclosed. The methods include applying a thermally stable backfill layer to a structured surface of a sacrificial template layer.
    Type: Application
    Filed: December 4, 2015
    Publication date: March 24, 2016
    Applicant: 3M Innovative Properties Company
    Inventors: Evan L. Schwartz, Justin P. Meyer, Olester Benson, Terry O. Collier, Michael Benton Free, Robert F. Kamrath, Mieczyslaw H. Mazurek, David B. Olson, K. Raveesh Shenoy, Martin B. Wolk
  • Publication number: 20160059528
    Abstract: Transfer films, articles made therewith, and methods of making and using transfer films to form an inorganic optical stack are disclosed.
    Type: Application
    Filed: August 27, 2014
    Publication date: March 3, 2016
    Inventors: Martin B. Wolk, Michael Benton Free, Daniel J. Schmidt, Mark J. Pellerite, Robert F. Kamrath, Stephen A. Johnson, Terry O. Collier, Haefa Mansour
  • Patent number: 9246134
    Abstract: Transfer films, articles made therewith, and methods of making and using transfer films to form bridged nanostructures are disclosed.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: January 26, 2016
    Assignee: 3M Innovative Properties Company
    Inventors: Evan L. Schwartz, Justin P. Meyer, Olester Benson, Jr., Terry O. Collier, Michael Benton Free, Robert F. Kamrath, Mieczyslaw H. Mazurek, David B. Olson, K. Raveesh Shenoy, Martin B. Wolk
  • Publication number: 20160018700
    Abstract: Optical constructions are disclosed. A disclosed optical construction includes a reflective polarizer layer, and an optical film that is disposed on the reflective polarizer layer. The optical film has an optical haze that is not less than about 50%. Substantial portions of each two neighboring major surfaces in the optical construction are in physical contact with each other. The optical construction has an axial luminance gain that is not less than about 1.2.
    Type: Application
    Filed: September 25, 2015
    Publication date: January 21, 2016
    Inventors: Encai HAO, Fei LU, William Blake KOLB, Brian W. OSTLIE, Adam D. HAAG, Michael Benton FREE, William D. COGGIO, Michael L. STEINER, Soemantri WIDAGDO, Kui CHEN-HO, Lan H. LIU, Robert F. KAMRATH, Scott M. TAPIO, John A. WHEATLEY, Charles D. HOYLE, Michael F. WEBER
  • Publication number: 20150207107
    Abstract: Transfer films, articles made therewith, and methods of making and using transfer films to form bridged nanostructures are disclosed.
    Type: Application
    Filed: January 20, 2014
    Publication date: July 23, 2015
    Applicant: 3M Innovative Properties Company
    Inventors: Evan L. Schwartz, Justin P. Meyer, Olester Benson, JR., Terry O. Collier, Michael Benton Free, Robert F. Kamrath, Mieczyslaw H. Mazurek, David B. Olson, K. Raveesh Shenoy, Martin B. Wolk
  • Publication number: 20150132583
    Abstract: Presently described are hardcoat compositions comprising at least one first (meth)acrylate monomer comprising at least three (meth)acrylate groups and C2-C4 alkoxy repeat units wherein the monomer has a molecular weight per (meth)acrylate group ranging from about 220 to 375 g/mole and at least one second (meth)acrylate monomer comprising at least three (meth)acrylate groups. In one embodiment, the hardcoat composition further comprises and at least 30 wt-% solids of silica nanoparticles having an average particle size ranging from 50 to 150 nm. In another embodiment, the hardcoat composition further comprises and at least 30 wt-% solids of inorganic oxide nanoparticles having an average particle size ranging from 50 to 150 nm. Also described are articles, such as protective films, displays, and touch screens comprising such cured hardcoat compositions.
    Type: Application
    Filed: July 10, 2013
    Publication date: May 14, 2015
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Richard J. Pokorny, Steven D. Solomonson, Robert F. Kamrath, Anthony M. Renstrom, Roger W. Barton, Craig R. Sykora
  • Publication number: 20150079313
    Abstract: Vacuum insulated glass units having layered pillars. The glass units include two glass panes and an edge seal between the glass panes with a substantial vacuum gap between them. A plurality of pillars are located between the glass panes as spacers to maintain the vacuum gap. The pillars have a sintered ceramic, alpha alumina, or zirconia body with a tapered sidewall and a functional layer on a surface of the body.
    Type: Application
    Filed: September 13, 2013
    Publication date: March 19, 2015
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: MARGARET M. VOGEL-MARTIN, MARTIN B. WOLK, MICHAEL BENTON FREE, OLESTER BENSON, Jr., EVAN L. SCHWARTZ, ROBERT F. KAMRATH, BRANT U. KOLB, KATHLEEN M. HUMPAL, MARK J. HENDRICKSON
  • Publication number: 20140242343
    Abstract: Transfer films, articles made therewith, and methods of making and using transfer films that include embedded nanostructures are disclosed. The articles include a sacrificial template layer having a first surface and a second surface having a structured surface opposite the first surface and a thermally stable backfill layer applied to the second surface of the sacrificial template layer. The thermally stable backfill layer has a structured surface conforming to the structured surface of the sacrificial template layer and the sacrificial template layer comprises inorganic nanomaterials and sacrificial material. The sacrificial material in the sacrificial template layer is capable of being cleanly baked out while leaving a densified layer of inorganic nanomaterials on the structured surface of the thermally stable backfill layer.
    Type: Application
    Filed: February 27, 2013
    Publication date: August 28, 2014
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Michael Benton Free, Martin B. Wolk, Margaret M. Vogel-Martin, Evan L. Schwartz, Mieczyslaw H. Mazurek, Robert F. Kamrath, Terry O. Collier, Olester Benson, JR.
  • Publication number: 20140071653
    Abstract: This application describes a back-lit transmissive display including a transmissive display (620) and a variable index light extraction layer (640) optically coupled to a lightguide (630). The variable index light extraction layer has first regions (140) of nanovoided polymeric material and second regions (130) of the nanovoided polymeric material and an additional material. The first and second regions are disposed such that for light being transported at a supercritical angle in the lightguide, the variable index light extraction layer selectively extracts the light in a predetermined way based on the geometric arrangement of the first and second regions. The transmissive display may be a transmissive display panel or a polymeric film such as a graphic.
    Type: Application
    Filed: May 9, 2012
    Publication date: March 13, 2014
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: David Scott Thompson, Kevin R. Schaffer, Zhaohui Yang, Encai Hao, Audrey A. Sherman, Michael A. Meis, John A. Wheatley, Matthew S. Stay, Robert F. Kamrath, Mikhail L. Pekurovsky, Steven D. Solomonson
  • Publication number: 20140022644
    Abstract: Antireflective films are described comprising a light transmissive substrate and a low refractive index layer disposed on the light transmissive substrate. The low refractive index layer comprises the reaction product of polymerizable resin composition comprising at least 20 wt-% fumed silica. In one embodiment, the polymerizable resin is ethylenically unsaturated. In a favored embodiment, the low refractive index layer increases in porosity from the light transmissive substrate interface to an opposing porous surface.
    Type: Application
    Filed: February 17, 2012
    Publication date: January 23, 2014
    Inventors: Encai Hao, Jun-Ying Zhang, Robert F. Kamrath, Lan H. Liu, Ming Cheng, Jung-Sheng Wu, Mark J. Pellerite, Richard J. Pokorny, Suresh S. Iyer
  • Publication number: 20130222911
    Abstract: An optical article includes an optical element and a low refractive index layer disposed on the optical element. The low refractive index layer having an effective refractive index of 1.3 or less and including a binder, a plurality of metal oxide particles dispersed in the binder and a plurality of interconnected voids. The low refractive index layer has a haze value of at least 30%.
    Type: Application
    Filed: October 14, 2011
    Publication date: August 29, 2013
    Inventors: William D. Coggio, Michael L. Steiner, William F. Edmonds, Robert F. Kamrath, Lan H. Liu, Encai Hao
  • Publication number: 20130202867
    Abstract: An optical article includes an optical element, a low refractive index layer disposed on the optical element having an effective refractive index of 1.3 or less and a polymeric protective layer disposed on the low refractive index layer. The low refractive index layer includes a binder, a plurality of metal oxide particles dispersed in the binder, and a plurality of interconnected voids. The polymeric protective layer does not increase an effective refractive index of the optical article by greater than 10%.
    Type: Application
    Filed: October 20, 2011
    Publication date: August 8, 2013
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: William D. Coggio, Ramesh C. Kumar, John A. Wheatley, Michael L. Steiner, William F. Edmonds, Lan H. Liu, Encai Hao, Robert F. Kamrath, John J. Stradinger
  • Patent number: 8343622
    Abstract: Antireflective films comprising a flexible high refractive index layer that comprises at least 60 wt-% of inorganic nanoparticles, the nanoparticles having a refractive index of at least 1.60, dispersed in a crosslinked organic material. Also described are surface treated nanoparticles.
    Type: Grant
    Filed: July 1, 2008
    Date of Patent: January 1, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Lan H. Liu, Robert F. Kamrath, Encai Hao, Taun L. McKenzie, Marc D. Radcliffe, Richard J. Pokorny, Christopher B. Walker, Jr., Anthony M. Renstrom
  • Publication number: 20120282455
    Abstract: An adhesive tie layer includes a binder including a multifunctional acrylate and a polyurethane, surface treated nanoparticles dispersed in the binder, and a plurality of interconnected voids. A volume fraction of interconnected voids in the adhesive tie layer is not less than about 10%.
    Type: Application
    Filed: November 29, 2010
    Publication date: November 8, 2012
    Inventors: Encai Hao, Kurt C. Melancon, Audrey A. Sherman, William Blake Kolb, Robert F. Kamrath, Maureen A. Kavanagh, Chris J. Tanley, Jeffrey A. Peterson
  • Patent number: 8202573
    Abstract: Presently described are self-assembling antireflective (“AR”) coating compositions comprising high refractive index surface modified nanoparticles. Also described are various articles such as protective films, optical displays, and windows, comprising such (e.g. dried and cured) AR coating.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: June 19, 2012
    Assignee: 3M Innovative Properties Company
    Inventors: Richard J. Pokorny, Thomas P. Klun, Marc D. Radcliffe, Robert F. Kamrath, Christopher B. Walker, Jr.
  • Publication number: 20120039089
    Abstract: Optical constructions are disclosed. A disclosed optical construction includes a reflective polarizer layer, and an optical film that is disposed on the reflective polarizer layer. The optical film has an optical haze that is not less than about 50%. Substantial portions of each two neighboring major surfaces in the optical construction are in physical contact with each other. The optical construction has an axial luminance gain that is not less than about 1.2.
    Type: Application
    Filed: April 15, 2010
    Publication date: February 16, 2012
    Applicant: 3M Innovative Properties Company
    Inventors: Encai Hao, Fei Lu, William Blake Kolb, Brian W. Ostlie, Adam D. Haag, Michael Benton Free, William D. Coggio, Michael L. Steiner, Soemantri Widagdo, Kui Chen-Ho, Lan H. Liu, Robert F. Kamrath, Scott M Tapio, John A. Wheatiey, Charles David Hoyle, Michael F Weber
  • Publication number: 20100189970
    Abstract: Presently described are self-assembling antireflective (“AR”) coating compositions comprising high refractive index surface modified nanoparticles. Also described are various articles such as protective films, optical displays, and windows, comprising such (e.g. dried and cured) AR coating.
    Type: Application
    Filed: September 2, 2008
    Publication date: July 29, 2010
    Inventors: Richard J. Pokorny, Thomas P. Klun, Marc D. Radcliffe, Robert F. Kamrath, Christopher B. Walker, JR.
  • Publication number: 20100003501
    Abstract: Antireflective films comprising a flexible high refractive index layer that comprises at least 60 wt-% of inorganic nanoparticles, the nanoparticles having a refractive index of at least 1.60, dispersed in a crosslinked organic material. Also described are surface treated nanoparticles.
    Type: Application
    Filed: July 1, 2008
    Publication date: January 7, 2010
    Inventors: Lan H. Liu, Robert F. Kamrath, Encai Hao, Taun L. McKenzie, Marc D. Radcliffe, Richard J. Pokorny, Christopher B. Walker, JR., Anthony M. Renstrom
  • Patent number: 7148882
    Abstract: The invention provides a novel capacitive device configured to detect differences in an applied force over a continuous range of applied force that includes zero force. The device includes first and second electrodes that are spaced apart a predetermined distance from each other in a rest position. A measurable capacitance exists between the first and second electrodes. Structured elements having a predetermined maximum dimension are positioned in the device to control the predetermined distance between the first and second electrodes. An applied force to the device causes a change in the distance between the first and second electrodes and a related change in the capacitance that can be measured to determine information related to the applied force.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: December 12, 2006
    Assignee: 3M Innovatie Properties Company
    Inventors: Robert F. Kamrath, Michael E. Hamerly, Billy L. Weaver