Patents by Inventor Ramesh C. Kumar

Ramesh C. Kumar 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: 10502869
    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: Grant
    Filed: October 20, 2011
    Date of Patent: December 10, 2019
    Assignee: 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
  • Publication number: 20190336409
    Abstract: Disclosed herein are methods that include contacting a skin surface with a first liquid composition; and then contacting in the skin surface with a cationic coated article loaded with a second liquid composition, while at least some portion of the first liquid composition remains on the skin surface, wherein one or both of the first liquid composition or the second liquid composition includes acrylate copolymer particles dispersed therein, the acrylate copolymer particles including the reaction product of a reaction mixture, the reaction mixture including monomers, the monomers including from about 5 wt % to about 50 wt % of at least one high Tg monomer where the wt % of the high Tg monomer is with respect to the total weight of the monomers in the reaction mixture; and from about 20 wt % to about 80 wt % of at least one low Tg monomer where the wt % of the low Tg monomer is with respect to the total weight of the monomers in the reaction mixture, wherein the particles have a number average diameter of at lea
    Type: Application
    Filed: January 2, 2018
    Publication date: November 7, 2019
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: RANJANI V. PARTHASARATHY, RAMESH C. KUMAR, MATTHEW T. SCHOLZ, STEVEN P. SWANSON, ANDREW W. VAIL, JERALD K. RASMUSSEN, GEORGE W. GRIESGRABER, CATHERINE D. HEAPY
  • Patent number: 10465017
    Abstract: Methods for preparing silicone-containing polymers by essentially adiabatic polymerization methods are disclosed. The polymerization system includes free radically polymerizable monomers. The monomers include ethylenically unsaturated silicone-containing monomers and/or mercapto-functional silicones as well as additional free radically polymerizable monomers. The silicone-containing polymers are useful as adhesives or release materials.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: November 5, 2019
    Assignee: 3M Innovative Properties Company
    Inventors: Audrey A. Sherman, Mark F. Ellis, Ramesh C. Kumar, Sonja S. Mackey, Richard L. Peloquin, Jeffrey O. Emslander
  • Publication number: 20190292325
    Abstract: Segmented silicone polyamide block copolymers that comprise dimer acid residues and articles containing the same.
    Type: Application
    Filed: July 20, 2017
    Publication date: September 26, 2019
    Inventors: Rajeep S. KALGUTKAR, Ramesh C. KUMAR, David S. Hays, Joseph A. SEVERANCE, Timothy M. HACKBARTH
  • Publication number: 20190284357
    Abstract: Compositions and films are described comprising a polylactic (PLA) polymer and a copolymer comprising a first moiety comprising a C12-C30 alkyl group and a second moiety that is miscible in the composition. Suitable first moieties include a C12-C30 alkyl (meth)acrylate or a polyvinyl alcohol comprising pendent C12-C30 alkyl groups. Suitable second moieties include C1-C10 (meth)acrylic acid or ester thereof, vinyl acetate and ethylene vinyl acetate. The aforementioned composition may be used to form a release layer of an adhesive article such as a pressure sensitive adhesive tape. The films may be a monolithic film or a film layer of a multilayer film. The release layer may be disposed upon a substrate layer that may also comprise PLA. The films are produced by melt extrusion of the aforementioned composition and may be oriented.
    Type: Application
    Filed: November 29, 2017
    Publication date: September 19, 2019
    Inventors: William W. Merrill, Jeffrey P. Kalish, Jacob D. Young, Ramesh C. Kumar, Sonja S. Mackey, Kanta Kumar, Adam R. Wohl, David J. Kinning, Michael D. Crandall, Ignatius A. Kadoma
  • Publication number: 20190263972
    Abstract: A copolymer composition that includes a silicone copolymer, methods of making the composition, and articles that include the composition, wherein the copolymer composition includes a silicone copolymer having a backbone composition that includes: silicone segments in an amount of 5 wt-% to 40 wt-%, based on the total weight of the silicone copolymer; hydrophilic segments in an amount of 40 wt-% to 75 wt-%, based on the total weight of the silicone copolymer; and reinforcing segments in an amount of 5 wt-% to 30 wt-%, based on the total weight of the silicone copolymer, wherein the reinforcing segments are derived from the reaction of one or more chain extenders with one or more multi-functional isocyanates, multi-functional carboxylic acids, multi-functional anhydrides, multi-functional esters, and/or multi-functional acid halides; wherein the silicone segments, hydrophilic segments, and reinforcing segments are connected through urea, urethane, amide, and/or oxamide linkages; wherein the hydrophilic segments
    Type: Application
    Filed: October 23, 2017
    Publication date: August 29, 2019
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: HANNAH C. COHEN, AMANDA C. ENGLER, RAN JAN I V. PARTHASARATHY, HAOMING RONG, RAMESH C. KUMAR, MATTHEW T. SCHOLZ, JAMES P. DIZIO, AUDREY A. SHERMAN, RICHARD G. HANSEN, DOUGLAS A. HANGGI, DALE J. CASE, DAVID D. JOHNSON
  • Publication number: 20190225843
    Abstract: Segmented silicone polyamide block copolymers that comprise dimer acid residues and articles containing the same.
    Type: Application
    Filed: July 26, 2017
    Publication date: July 25, 2019
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Rajeep S. KALGUTKAR, Ramesh C. KUMAR, David S. Hays, Joseph A. SEVERANCE, Timothy M. HACKBARTH
  • Publication number: 20180360728
    Abstract: Disclosed herein are compositions that include at least about 85 wt % of a hydroalcoholic solution that includes at least about 1 wt % water; and about 30 to about 85 wt % of at least one C1 to C4 alkyl alcohol based on the total weight of the hydroalcoholic solution; and acrylate copolymer particles dispersed in the hydroalcoholic solution, the acrylate copolymers particles being the reaction product of a reaction mixture, the reaction mixture including monomers, the monomers including from about 5 wt % to about 50 wt % of at least one high Tg monomer; and from about 20 w% to about 80 wt % of at least one low Tg monomer where the wt % of the low and high Tg monomers are with respect to the total weight of the monomers in the reaction mixture, wherein the particles have a number average diameter of at least about 100 nm.
    Type: Application
    Filed: June 27, 2016
    Publication date: December 20, 2018
    Inventors: Ranjani V. Parthasarathy, Ramesh C. Kumar, Matthew T. Scholz, Steven P. Swanson, Erin A. Satterwhite
  • Publication number: 20180148517
    Abstract: Methods for preparing silicone-containing polymers by essentially adiabatic polymerization methods are disclosed. The polymerization system includes free radically polymerizable monomers. The monomers include ethylenically unsaturated silicone-containing monomers and/or mercapto-functional silicones as well as additional free radically polymerizable monomers. The silicone-containing polymers are useful as adhesives or release materials.
    Type: Application
    Filed: January 25, 2018
    Publication date: May 31, 2018
    Inventors: Audrey A. Sherman, Mark F. Ellis, Ramesh C. Kumar, Sonja S. Mackey, Richard L. Peloquin, Jeffrey O. Emslander
  • Publication number: 20180148518
    Abstract: Methods for preparing silicone-containing polymers by essentially adiabatic polymerization methods are disclosed. The polymerization system includes free radically polymerizable monomers. The monomers include ethylenically unsaturated silicone-containing monomers and/or mercapto-functional silicones as well as additional free radically polymerizable monomers. The silicone-containing polymers are useful as adhesives or release materials.
    Type: Application
    Filed: January 25, 2018
    Publication date: May 31, 2018
    Inventors: Audrey A. Sherman, Mark F. Ellis, Ramesh C. Kumar, Sonja S. Mackey, Richard L. Peloquin, Jeffrey O. Emslander
  • Publication number: 20180057716
    Abstract: The disclosure relates to articles comprising a substrate, a pressure sensitive adhesive, and a release layer, wherein the release layer comprises at least one silicone carbonate polymer.
    Type: Application
    Filed: January 28, 2016
    Publication date: March 1, 2018
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: PHILLIP H. HENNA, RAMESH C. KUMAR
  • Patent number: 9796885
    Abstract: A hand-tearable masking tape, comprising a plastic backing with a low adhesion backsize on the first major side of the backing and a pressure-sensitive adhesive on the second major side of the backing; wherein the second major side of the backing comprises a microstructured hand-tear pattern and wherein the low adhesion backsize comprises the reaction product of a mercapto-functional silicone macromer.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: October 24, 2017
    Assignee: 3M Innovative Properties Company
    Inventors: Joseph T. Bartusiak, Ramesh C. Kumar
  • Publication number: 20170240676
    Abstract: A composition including at least one moisture-curable, semi-crystalline (meth)acrylic oligomer represented by the formula: wherein R1 is independently a C16 to C40 alkyl group; R2 is independently a C16 to C40 alkyl group; each R3 is independently a methyl, ethyl, or isopropyl group; X is a chain transfer agent as defined further below; Y is independently selected to be a methyl, ethyl, or isopropyl group; a, b and c are each independently selected to be an integer of at least 10, and a+b+c?1500; n?1; and p is 0, 1, 2, or 3. The oligomer may be used advantageously as a coating, primer or adhesion promoter in construction articles, for example, adhesives, caulks, grouts, pavement markings, paving materials, ceramic tiles, or roofing granules.
    Type: Application
    Filed: May 10, 2017
    Publication date: August 24, 2017
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Rajdeep S. Kalgutkar, Mark F. Ellis, John R. Jacobsen, Ramesh C. Kumar, Mary L. Morris, Michael A. Lockett, Jesse R. Behnke
  • Publication number: 20170218234
    Abstract: A hand-tearable masking tape, comprising a plastic backing with a low adhesion backsize on the first major side of the backing and a pressure-sensitive adhesive on the second major side of the backing; wherein the second major side of the backing comprises a microstructured hand-tear pattern and wherein the low adhesion backsize comprises the reaction product of a mercapto-functional silicone macromer.
    Type: Application
    Filed: April 18, 2017
    Publication date: August 3, 2017
    Inventors: Joseph T. Bartusiak, Ramesh C. Kumar
  • Patent number: 9663684
    Abstract: A hand-tearable masking tape, comprising a plastic backing with a low adhesion backsize on the first major side of the backing and a pressure-sensitive adhesive on the second major side of the backing; wherein the second major side of the backing comprises a microstructured hand-tear pattern and wherein the low adhesion backsize comprises the reaction product of a mercapto-functional silicone macromer.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: May 30, 2017
    Assignee: 3M Innovative Properties Company
    Inventors: Joseph T. Bartusiak, Ramesh C. Kumar
  • Publication number: 20160326290
    Abstract: A composition suitable for use as a low adhesion backsize or a primer for low surface energy adhesives, including the reaction product of at least one moisture-curable, semi-crystalline (meth)acrylic oligomer represented by the formula: wherein R1 is independently a C16 to C40 alkyl group; R2 is independently a C1 to C40 alkyl group; each R3 is independently a methyl, ethyl, or isopropyl group; X is a chain transfer agent as defined further below; Y is independently selected to be a methyl, ethyl, or isopropyl group; a, b and c are each independently selected to be an integer of at least 10, and a+b+c<1500; n>1; and p is 0, 1, 2, or 3. Articles and methods of using the composition as a low adhesion backsize or a primer for a low surface energy adhesive are also described.
    Type: Application
    Filed: December 22, 2014
    Publication date: November 10, 2016
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Ramesh C. Kumar, Mark F. Ellis, John R. Jacobsen, Michael A. Lockett, Rajdeep S. Kalgutkar
  • Patent number: 9279035
    Abstract: Copolymers containing at least one perfluoropolyether segment and multiple aminooxalylamino groups are described. Methods of making the copolymers are also described. The copolymers can be prepared by reacting an oxalylamino-containing compound and an amine compound having at least two primary amino groups, at least two secondary amino groups, or at least one primary amino group plus at least one secondary amino group.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: March 8, 2016
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Suresh S. Iyer, Miguel A. Guerra, Richard G. Hansen, David S. Hays, Ramesh C. Kumar, George G. I. Moore, Yu Yang
  • Publication number: 20150307668
    Abstract: A composition including at least one moisture-curable, semi-crystalline (meth)acrylic oligomer represented by the formula: wherein R1 is independently a C16 to C40 alkyl group; R2 is independently a C16 to C40 alkyl group; each R3 is independently a methyl, ethyl, or isopropyl group; X is a chain transfer agent as defined further below; Y is independently selected to be a methyl, ethyl, or isopropyl group; a, b and c are each independently selected to be an integer of at least 10, and a+b+c?1500; n?1; and p is 0, 1, 2, or 3. The oligomer may be used advantageously as a coating, primer or adhesion promoter in construction articles, for example, adhesives, caulks, grouts, pavement markings, paving materials, ceramic tiles, or roofing granules.
    Type: Application
    Filed: March 1, 2013
    Publication date: October 29, 2015
    Inventors: Rajdeep S. Kalgutkar, Mark F. Ellis, John R. Jacobsen, Ramesh C. Kumar, Mary L. Morris, Michael A. Lockett, Jesse R. Behnke
  • Publication number: 20150057428
    Abstract: Copolymers containing at least one perfluoropolyether segment and multiple aminooxalylamino groups are described. Methods of making the copolymers are also described. The copolymers can be prepared by reacting an oxalylamino-containing compound and an amine compound having at least two primary amino groups, at least two secondary amino groups, or at least one primary amino group plus at least one secondary amino group.
    Type: Application
    Filed: October 30, 2014
    Publication date: February 26, 2015
    Inventors: Suresh S. Iyer, Miguel A. Guerra, Richard G. Hansen, David S. Hays, Ramesh C. Kumar, George G.I. Moore, Yu Yang
  • Patent number: 8907046
    Abstract: Copolymers containing at least one perfluoropolyether segment and multiple aminooxalylamino groups are described. Methods of making the copolymers are also described. The copolymers can be prepared by reacting an oxalylamino-containing compound and an amine compound having at least two primary amino groups, at least two secondary amino groups, or at least one primary amino group plus at least one secondary amino group.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: December 9, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Suresh S. Iyer, Miguel A. Guerra, Richard G. Hansen, David S. Hays, Ramesh C. Kumar, George G. I. Moore, Yu Yang