Patents by Inventor Mridula Nair

Mridula Nair 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: 10233590
    Abstract: A foamable aqueous composition can be used to form foamed, opacifying elements with one or more dry foamed layers. These compositions generally contain: (a) 0.5 to 20 weight % of porous particles comprising a continuous polymeric phase and discrete pores dispersed within the continuous polymeric phase. The porous particles have a mode particle size of 2 to 50 ?m; (b) at least 20 weight % of a binder material; (c) 0.1 to 30 weight % of a combination of various additives including dispersants, plasticizers, inorganic or organic pigments and dyes, flame retardants, biocides, fungicides, optical brighteners, tinting colorants, metal flakes, and inorganic or organic fillers; (d) water; and (e) at least 0.001 weight % of an opacifying colorant different from (c). The foamable aqueous composition is suitably aerated, disposed on a porous substrate, dried, and crushed on the porous substrate to form a foamed, opacifying element.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: March 19, 2019
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Mary Christine Brick, Mridula Nair, Tomas Gerard Patrick McHugh
  • Patent number: 10233300
    Abstract: Foamable aqueous compositions can be foamed and applied to porous substrates to make light-blocking dry opacifying elements. Such compositions have 0.05-15 weight % of porous particles; at least 20 weight % of a binder; at least 0.0001 weight % of additives (including a surfactant); water; and at least 0.001 weight % of an opacifying colorant. Each porous particle includes a continuous polymeric phase and discrete pores; a mode particle size of 2-50 ?m; and a porosity of 20-70 volume %. The continuous polymeric phase Tg is >80° C. and has a polymer viscosity of 80-500 centipoises at an ethyl acetate shear rate of 100 sec?1 at a concentration of 20 weight % at 25° C. The dry opacifying element light blocking value is at least 4 and has a luminous reflectance >40% as measured by the color space Y tristimulus value. The foamed aqueous composition has a foam density of 0.1-0.5 g/cm3.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: March 19, 2019
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Mridula Nair, Mary Christine Brick, Joseph Salvatore Sedita
  • Patent number: 10145061
    Abstract: Foamed, opacifying element comprising a thermal colorant image is prepared using a porous substrate having an opposing external surface and an internal surface, and a dry foamed composition disposed on the internal surface of the porous substrate as a dry opacifying layer that has a light blocking value of at least 4 as well as a luminous reflectance that is greater than 40% as measured by the Y tristimulus value. A thermal colorant image is provided on either the opposing external surface, the dry opacifying layer, or both the opposing external surface and the dry opacifying layer, by thermal colorant transfer from a thermal donor element comprising a colorant donor layer having one or more thermal colorants.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: December 4, 2018
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Diane Marie Herrick, Mridula Nair
  • Patent number: 10138342
    Abstract: Foamable aqueous compositions can be foamed and applied to porous substrates to make light-blocking dry opacifying elements. Such compositions have 0.05-15 weight % of porous particles; at least 20 weight % of a binder; at least 0.0001 weight % of additives (including a surfactant); water; and at least 0.001 weight % of an opacifying colorant. Each porous particle includes a continuous polymeric phase and discrete pores; a mode particle size of 2-50 ?m; and a porosity of 20-70 volume %. The continuous polymeric phase Tg is >80° C. and has a polymer viscosity of 80-500 centipoises at an ethyl acetate shear rate of 100 sec?1 at a concentration of 20 weight % at 25° C. The dry opacifying element light blocking value is at least 4 and has a luminous reflectance >40% as measured by the Y tristimulus value. The foamed aqueous composition has a foam density of 0.1-0.5 g/cm3.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: November 27, 2018
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Mridula Nair, Mary Christine Brick, Ellen M. Pyszczek
  • Patent number: 10132031
    Abstract: A foamed, opacifying element has a thermal colorant image on either an opposing external surface and an internal surface of a porous substrate. The internal surface has a dry foamed composition disposed thereon as a dry opacifying layer that comprises: (a) 0.1-40 weight % of porous particles; (b) at least 10 weight % of an at least partially cured binder material; (c) at least 0.2 weight % of one or more additives comprising a surfactant; (d) less than 5 weight % of water; and (e) at least 0.002 weight % of an opacifying colorant different from all of the one or more (c) additives, which opacifying colorant absorbs predetermined electromagnetic radiation. The thermal colorant image is derived from thermal colorant transfer of sublimable colorants from a thermal donor element.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: November 20, 2018
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Mridula Nair, Diane Marie Herrick
  • Publication number: 20180327965
    Abstract: Foamed, opacifying element comprising a thermal colorant image is prepared using a porous substrate having an opposing external surface and an internal surface, and a dry foamed composition disposed on the internal surface of the porous substrate as a dry opacifying layer that has a light blocking value of at least 4 as well as a luminous reflectance that is greater than 40% as measured by the Y tristimulus value. A thermal colorant image is provided on either the opposing external surface, the dry opacifying layer, or both the opposing external surface and the dry opacifying layer, by thermal colorant transfer from a thermal donor element comprising a colorant donor layer having one or more thermal colorants.
    Type: Application
    Filed: May 9, 2017
    Publication date: November 15, 2018
    Inventors: Diane Marie Herrick, Mridula Nair
  • Publication number: 20180327964
    Abstract: A foamed, opacifying element has a thermal colorant image on either an opposing external surface and an internal surface of a porous substrate. The internal surface has a dry foamed composition disposed thereon as a dry opacifying layer that comprises: (a) 0.1-40 weight % of porous particles; (b) at least 10 weight % of an at least partially cured binder material; (c) at least 0.2 weight % of one or more additives comprising a surfactant; (d) less than 5 weight % of water; and (e) at least 0.002 weight % of an opacifying colorant different from all of the one or more (c) additives, which opacifying colorant absorbs predetermined electromagnetic radiation. The thermal colorant image is derived from thermal colorant transfer of sublimable colorants from a thermal donor element.
    Type: Application
    Filed: May 9, 2017
    Publication date: November 15, 2018
    Inventors: Mridula Nair, Diane Marie Herrick
  • Publication number: 20180223474
    Abstract: A foamed, opacifying element has a porous substrate composed of woven yarn strands composed of a thermoplastic polymer-coated multifilament core. It has a dry foamed composition on an opposing surface of the substrate, which includes: (a) 0.1-40 weight % of porous particles; (b) 10-80 weight %; (c) 0.2-50 weight % of one or more additives selected from the group consisting of dispersants, plasticizers, flame retardants, optical brighteners, thickeners, biocides, fungicides, tinting colorants, metal flakes, and inert inorganic or organic fillers; (d) less than 5 weight % of water; and (e) at least 0.002 weight % of an opacifying colorant different from all of the one or more additives of (c), which opacifying colorant absorbs electromagnetic radiation having a wavelength of 380-800 nm. The elements have a light-blocking value (LBV) of at least 4 and can have a bending stiffness that is greater than 0.15 milliNewtons-meter.
    Type: Application
    Filed: April 3, 2018
    Publication date: August 9, 2018
    Inventors: Mridula Nair, Mary Christine Brick, Joseph Salvatore Sedita
  • Publication number: 20180128946
    Abstract: A light-blocking article is designed to be lightweight but effective to block most incident actinic radiation and can be designed into fabrics, curtains, and other materials. Such an article has an opacifying layer that is capable of blocking predetermined electromagnetic radiation. The article contains (a) porous particles comprising a continuous polymeric binder and pores within the continuous polymeric binder, the porous particles having a glass transition temperature of at least 25° C. and a mode particle size of at least 2 ?m and up to and including 50 ?m. The article also contains an opacifying colorant that absorbs the predetermined electromagnetic radiation (such as within 400 nm to 700 nm), in an amount of at least 0.001 weight % based on the total dry weight of the opacifying layer, and a matrix polymer in which the porous particles and opacifying colorant are dispersed.
    Type: Application
    Filed: January 2, 2018
    Publication date: May 10, 2018
    Inventors: Kevin D. Lofftus, Mridula Nair, Mary Christine Brick
  • Patent number: 9963569
    Abstract: A method for providing a foamed, opacifying element includes providing a foamable aqueous composition, aerating it to a foam density of 0.1-0.5 g/cm3, applying the foamed aqueous composition to a porous substrate, drying, and densifying the dried layer. Such foamable aqueous compositions have 0.05-15 weight % of porous particles; at least 20 weight % of a binder; at least 0.0001 weight % of additives (including a surfactant); water; and at least 0.001 weight % of an opacifying colorant. Each porous particle includes a continuous polymeric phase and discrete pores; a mode particle size of 2-50 ?m; and a porosity of 20-70 volume %. The continuous polymeric phase Tg is >80° C. and has a polymer viscosity of 80-500 centipoises at an ethyl acetate shear rate of 100 sec?1 at a concentration of 20 weight % at 25° C.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: May 8, 2018
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Mridula Nair, Mary Christine Brick, Peter G. Bessey
  • Publication number: 20180094112
    Abstract: A foamed, opacifying element having a target light blocking value (LBVT) and a target porous substrate is prepared by determining the light blocking value (LBVS) of the target porous substrate; calculating the LBVT-S difference; choosing a foamable aqueous composition; determining a dry coating weight for the chosen foamable aqueous composition (when foamed); and using the dry coating weight to form the single dry opacifying layer as the only layer disposed on the target porous substrate, such that the single dry opacifying layer has light blocking value that is equal to LBVT-S, ±10%. The chosen foamable aqueous composition comprises the essential components (a) through (e) described herein. The desired foamable aqueous composition can be chosen from a set of similar compositions to achieve the desired LBVT with the noted target porous substrate using suitable mathematical formula relating dry coating weight to light blocking value and a suitable data processor.
    Type: Application
    Filed: October 3, 2016
    Publication date: April 5, 2018
    Inventors: MRIDULA NAIR, JOSEPH SALVATORE SEDITA, MARY CHRISTINE BRICK
  • Publication number: 20180051155
    Abstract: A method for providing a foamed, opacifying element includes providing a foamable aqueous compositions, aerating it to a foam density of 0.1-0.5 g/cm3, applying the foamed aqueous composition to a porous substrate, drying, and densifying the dried layer Such foamable aqueous compositions have 0.05-15 weight % of porous particles; at least 20 weight % of a binder; at least 0.0001 weight % of additives (including a surfactant); water; and at least 0.001 weight % of an opacifying colorant. Each porous particle includes a continuous polymeric phase and discrete pores; a mode particle size of 2-50 ?m; and a porosity of 20-70 volume %. The continuous polymeric phase Tg is>80° C. and has a polymer viscosity of 80-500 centipoises at an ethyl acetate shear rate of 100 sec?1 at a concentration of 20 weight % at 25° C.
    Type: Application
    Filed: August 18, 2016
    Publication date: February 22, 2018
    Inventors: Mridula Nair, Mary Christine Brick, Peter G. Bessey
  • Publication number: 20180051150
    Abstract: Foamable aqueous compositions can be foamed and applied to porous substrates to make light-blocking dry opacifying elements. Such compositions have 0.05-15 weight % of porous particles; at least 20 weight % of a binder; at least 0.0001 weight % of additives (including a surfactant); water; and at least 0.001 weight % of an opacifying colorant. Each porous particle includes a continuous polymeric phase and discrete pores; a mode particle size of 2-50 ?m; and a porosity of 20-70 volume %. The continuous polymeric phase Tg is >80° C. and has a polymer viscosity of 80-500 centipoises at an ethyl acetate shear rate of 100 sec?1 at a concentration of 20 weight % at 25° C. The dry opacifying element light blocking value is at least 4 and has a luminous reflectance>40% as measured by the Y tristimulus value. The foamed aqueous composition has a foam density of 0.1-0.5 g/cm3.
    Type: Application
    Filed: August 18, 2016
    Publication date: February 22, 2018
    Inventors: Mridula Nair, Mary Christine Brick, Ellen M. Pyszczek
  • Publication number: 20180051152
    Abstract: Foamable aqueous compositions can be foamed and applied to porous substrates to make light-blocking dry opacifying elements. Such compositions have 0.05-15 weight % of porous particles; at least 20 weight % of a binder; at least 0.0001 weight % of additives (including a surfactant); water; and at least 0.001 weight % of an opacifying colorant. Each porous particle includes a continuous polymeric phase and discrete pores; a mode particle size of 2-50 ?m; and a porosity of 20-70 volume %. The continuous polymeric phase Tg is >80° C. and has a polymer viscosity of 80-500 centipoises at an ethyl acetate shear rate of 100 sec?1 at a concentration of 20 weight % at 25° C. The dry opacifying element light blocking value is at least 4 and has a luminous reflectance >40% as measured by the color space Y tristimulus value. The foamed aqueous composition has a foam density of 0.1-0.5 g/cm3.
    Type: Application
    Filed: August 18, 2016
    Publication date: February 22, 2018
    Inventors: Mridula Nair, Mary Christine Brick, Joseph Salvatore Sedita
  • Patent number: 9891350
    Abstract: A light-blocking article is designed to be lightweight but effective to block most incident actinic radiation and can be designed into fabrics, curtains, and other materials. Such an article has an opacifying layer that is capable of blocking predetermined electromagnetic radiation. The article contains (a) porous particles comprising a continuous polymeric binder and pores within the continuous polymeric binder, the porous particles having a glass transition temperature of at least 25° C. and a mode particle size of at least 2 ?m and up to and including 50 ?m. The article also contains an opacifying colorant that absorbs the predetermined electromagnetic radiation (such as within 400 nm to 700 nm), in an amount of at least 0.001 weight % based on the total dry weight of the opacifying layer, and a matrix polymer in which the porous particles and opacifying colorant are dispersed.
    Type: Grant
    Filed: February 17, 2014
    Date of Patent: February 13, 2018
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Kevin D. Lofftus, Mridula Nair, Mary Christine Brick
  • Patent number: 9815958
    Abstract: Polymeric porous particles have a continuous organic solid phase and at least two sets of discrete pores that are isolated from each other within the continuous phase and that have different average sizes. One set of discrete pores has a larger average size than another set of discrete pores by at least 50%. At least one set of discrete pores is free of detectably different marker materials. There porous particles can be prepared using evaporative limited coalescence techniques with especially chosen discrete pore stabilizing hydrocolloids to protect the pores during formation and to provide the different average sizes. The resulting porous particles can be incorporated into articles of various types and having various shapes.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: November 14, 2017
    Assignee: EASTMAN KODAK COMPANY
    Inventors: David Charles Boris, Teresa Joy Hosmer, Mridula Nair
  • Patent number: 9658545
    Abstract: Composite materials such as composite particles have a solid non-elastomeric continuous phase made of an organic polymer having a glass transition temperature of at least 25° C. Dispersed within this solid non-elastomeric continuous phase are many multi-compartment porous chemically crosslinked elastomeric particles that have a mode particle size of at least 1 ?m and up to and including 10 ?m. The composite particles can be used as toner particles in electrophotographic imaging methods to provide fused toner images and especially stacked fused toner images.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: May 23, 2017
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Mridula Nair, Joseph Salvatore Sedita, Peter David Rollinson
  • Publication number: 20160354804
    Abstract: A foamable aqueous composition can be used to form foamed, opacifying elements. These compositions have: (a) 0.5 to 20 weight % of porous particles having a continuous polymeric phase and discrete pores dispersed therein. The porous particles have a mode particle size of 2 to 50 ?m; (b) at least 20 weight % of a binder material; (c) 0.1 to 30 weight % of additives including dispersants, plasticizers, inorganic or organic pigments and dyes, thickeners, flame retardants, biocides, fungicides, optical brighteners, tinting colorants, metal flakes, and inorganic or organic fillers; (d) water; and (e) at least 0.001 weight % of an opacifying colorant different from (c). The foamable aqueous composition is suitably aerated, disposed on a porous substrate, dried, and crushed on the porous substrate. The method can be used to provide such elements with one or more dry foamed layers.
    Type: Application
    Filed: May 3, 2016
    Publication date: December 8, 2016
    Inventors: Mary Christine Brick, Mridula Nair, Kimberlv S. Lindner, Peter G. Bessey
  • Publication number: 20160355660
    Abstract: A foamable aqueous composition can be used to form foamed, opacifying elements with one or more dry foamed layers. These compositions generally contain: (a) 0.5 to 20 weight % of porous particles comprising a continuous polymeric phase and discrete pores dispersed within the continuous polymeric phase. The porous particles have a mode particle size of 2 to 50 ?m; (b) at least 20 weight % of a binder material; (c) 0.1 to 30 weight % of a combination of various additives including dispersants, plasticizers, inorganic or organic pigments and dyes, flame retardants, biocides, fungicides, optical brighteners, tinting colorants, metal flakes, and inorganic or organic fillers; (d) water; and (e) at least 0.001 weight % of an opacifying colorant different from (c). The foamable aqueous composition is suitably aerated, disposed on a porous substrate, dried, and crushed on the porous substrate to form a foamed, opacifying element.
    Type: Application
    Filed: May 3, 2016
    Publication date: December 8, 2016
    Inventors: Mary Christine Brick, Mridula Nair, Tomas Gerard Patrick McHugh
  • Patent number: 9469738
    Abstract: Foamable aqueous compositions can be used to form light-blocking and light-colored foamed, opacifying elements with one or more dry foamed layers. The compositions contain: (a) 0.05 to 20 weight % of porous particles comprising a continuous polymeric phase and a first set of discrete pores, the porous particles having a mode particle size of 2 to 50 ?m; (b) at least 20 weight % of a binder material (that can be curable); (c) 0.1 to 30 weight % of one or more additives including dispersants, plasticizers, inorganic or organic pigments or dyes, thickeners, flame retardants, biocides, fungicides, optical brighteners, tinting colorants, metal flakes, and inorganic or organic fillers; (d) water; and (e) at least 0.001 weight % of an opacifying colorant different from (c), which opacifying colorant absorbs electromagnetic radiation. The foamable aqueous composition can be aerated, disposed on a porous substrate, dried, and crushed on that porous substrate.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: October 18, 2016
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Mridula Nair, Mary Christine Brick, Ellen J. Pyszczek