Patents by Inventor Mamie Kam-Ng

Mamie Kam-Ng 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: 8164790
    Abstract: Methods of improving image quality by reducing grain and texture in a printed image are provided. According to one embodiment, a method of reducing grain and texture in an image includes the steps of providing a light color toner and a dark color toner, providing an aperiodic micrononuniformity map, using the aperiodic micrononuniformity map to determine an acceptable domain that includes a plurality of combinations of the light color toner and the dark color toner, and forming an image by selecting one combination of the light color toner and the dark color toner from the plurality of combinations of the light color toner and the dark color toner.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: April 24, 2012
    Assignee: Eastman Kodak Company
    Inventors: Yee S. Ng, Mamie Kam Ng, legal representative, Hwai-Tzuu Tai, Peter S. Alexandrovich, Chung-Hui Kuo
  • Patent number: 6348304
    Abstract: The invention relates to a photographic element comprising at least one layer of photosensitive silver halide, a base material wherein said base material comprises at least one bottom sheet of biaxially oriented polymer sheet and deformable tie layer material, wherein said deformable tie layer material yield stress of between 6 and 10 MPa in compression which is less than 10% the yield stress of any of the other layers in the element.
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: February 19, 2002
    Assignee: Eastman Kodak Company
    Inventors: Thaddeus S. Gula, Richard C. McElroy, Mamie Kam-Ng
  • Patent number: 5460928
    Abstract: A color photographic element has a blue sensitive tabular grain silver halide emulsion layer the halide content of which is less than 80% chloride and which has a tabularity of at least 8. The foregoing emulsion is sensitized such that the wavelength of maximum sensitivity of the emulsion between 400-500 nm (".lambda..sub.Bmax "), the sensitivity at 485 nm ("S.sub.485 "), the sensitivity at 410 nm ("S.sub.410 "), and the sensitivity at .lambda..sub.Bmax (".lambda..sub.Bmax "), are defined by:430 nm.gtoreq..lambda..sub.Bmax .gtoreq.440 nm or 450 nm.gtoreq..lambda..sub.Bmax .gtoreq.480 nmandS.sub.485 .gtoreq.50% (S.sub.Bmax)S.sub.410 .gtoreq.60% (S.sub.Bmax)and the maximum sensitivity of the emulsion between 430-440 nm ("S.sub.(430-440)max "), and the maximum sensitivity between 450-480 nm ("S.sub.(450-480)max "), have the following relationship:90% (S.sub.(450-480)max).gtoreq.S.sub.(430-440)max .gtoreq.110%(S.sub.(450-480)max).
    Type: Grant
    Filed: April 15, 1994
    Date of Patent: October 24, 1995
    Assignee: Eastman Kodak Company
    Inventors: Mamie Kam-Ng, Drake M. Michno, John D. Buhr
  • Patent number: 5358840
    Abstract: Silver iodobromide tabular grain emulsions of enhanced photographic sensitivity are disclosed. The silver iodobromide grains contain from 2 to less than 10 mole percent iodide, exhibit a coefficient of variation of less than 20 percent, and consisting essentially of tabular grains having opposed parallel major faces. Each of the tabular silver bromoiodide grains exhibit an iodide concentration in excess of 6 mole percent within a surface region extending to a depth of less than 0.02 .mu.m and exhibit a central iodide concentration of less than 2 mole percent.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: October 25, 1994
    Assignee: Eastman Kodak Company
    Inventors: Eleanor Chaffee, Mamie Kam-Ng, Allen K. Tsaur, David E. Fenton, Donald L. Black
  • Patent number: 5272048
    Abstract: A multicolor photographic element capable of forming a viewable reversal dye image is disclosed comprising a support and, coated on the support, a blue recording yellow dye image forming layer unit, a green recording magenta dye image forming layer unit, and a red recording cyan dye image forming layer unit, each of the layer units containing in at least one layer a silver halide emulsion having a grain halide content of from 0 to 5 mole percent chloride, from. 0.5 to 20 mole percent iodide, and from 80 to 99.5 mole percent bromide, based on total silver.The photographic element is characterized in that at least one of the silver halide emulsion layers is a tabular grain emulsion layer in which the coefficient of variation of the tabular grain emulsion is less than 15 percent, based on the total grain population of the emulsion, and the total grain population of the tabular emulsion consists essentially of tabular grains having a mean thickness of less than 0.3 .mu.m and a mean tabularity of greater than 25.
    Type: Grant
    Filed: March 4, 1992
    Date of Patent: December 21, 1993
    Assignee: Eastman Kodak Company
    Inventors: Sang H. Kim, Mamie Kam-Ng, Allen K. Tsaur, Jacob I. Cohen, Richard A. Demauriac, George H. Hawks, III, John D. Baloga
  • Patent number: 5252453
    Abstract: A process is disclosed of accelerating the preparation of a photographic emulsion containing tabular silver halide grains exhibiting a reduced degree of total grain dispersity. A dispersing medium is provided containing bromide ions, and a population of silver halide grain nuclei containing parallel twin planes is formed in the dispersing medium. A portion of the grain nuclei are ripened out, and then the silver halide grain nuclei containing parallel twin planes remaining are grown to form tabular silver halide grains. A polyalkylene oxide containing both hydrophilic and lipophilic block units is selected from among those known to be capable of reducing total grain dispersity when present during nucleation. However, in this process precipitation is accelerated while maintaining low dispersity of the total grain population by forming twin planes in the grain nuclei within the pAg and temperature boundaries of Curve A in FIG.
    Type: Grant
    Filed: November 4, 1992
    Date of Patent: October 12, 1993
    Assignee: Eastman Kodak Company
    Inventors: Allen K. Tsaur, Mamie Kam-Ng, Sang H. Kim
  • Patent number: 5236817
    Abstract: A multicolor photographic element capable of forming a viewable reversal dye image is disclosed comprising a support and, coated on the support, a blue recording yellow dye image forming layer unit, a green recording magenta dye image forming layer unit, and a red recording cyan dye image forming layer unit, each of the dye image forming layer units containing at least one silver halide emulsion layer comprised of a vehicle and silver halide grains having (1) a halide content of from 0 to 5 mole percent chloride, from 0.1 to 20 mole percent iodide, and from 80 to 99.9 mole percent bromide, based on total silver. At least one of the silver halide emulsion layers in one of the layer units positioned to receive exposing radiation prior to at least one of the green or red recording layer units is a tabular grain emulsion layer in which a polyalkylene oxide block copolymer is present selected to allow the preparation of tabular grains having a mean thickness of less than 0.3 .mu.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: August 17, 1993
    Assignee: Eastman Kodak Company
    Inventors: Sang H. Kim, Mamie Kam-Ng, Allen K. Tsaur, Jacob I. Cohen, Richard A. Demauriac, George H. Hawks, III, John D. Baloga
  • Patent number: 5210013
    Abstract: A photographic emulsion is disclosed containing a coprecipitated grain population exhibiting a coefficient of variation of less than 10 percent. The coprecipitated grain population consists essentially of tabular grains which are at least 50 mole percent bromide, based on silver, and which have a mean thickness in the range of from 0.080 to 0.3 .mu.m, and a mean tabularity of greater than 8.
    Type: Grant
    Filed: May 14, 1991
    Date of Patent: May 11, 1993
    Assignee: Eastman Kodak Company
    Inventors: Allen K. Tsaur, Mamie Kam-Ng
  • Patent number: 5171659
    Abstract: A process is disclosed of preparing a photographic emulsion containing tabular silver halide grains exhibiting a reduced degree of total grain dispersity. After forming a population of silver halide grain nuclei containing parallel twin planes, ripening out a portion of the silver halide grain nuclei. The silver halide grain nuclei containing parallel twin planes remaining are then grown to form tabular silver halide grains. The total grain dispersity of the emulsion is reduced by incorporating bromide ion in the dispersing medium prior to forming the silver halide grain nuclei and, at the time parallel twin planes are formed in the silver halide grain nuclei, a polyalkylene oxide block copolymer surfactant containing terminal hydrophilic alkylene oxide block units linked by a lipophilic alkylene oxide block unit accounting for at least 4 percent of the molecular weight of the copolymer.
    Type: Grant
    Filed: May 14, 1991
    Date of Patent: December 15, 1992
    Assignee: Eastman Kodak Company
    Inventors: Allen K. Tsaur, Mamie Kam-Ng
  • Patent number: 5147772
    Abstract: A process is disclosed of preparing a photographic emulsion containing tabular silver halide grains exhibiting a reduced degree of total grain dispersity. After forming a population of silver halide grain nuclei containing parallel twin planes, a portion of the silver halide grain nuclei are ripened out. The silver halide grain nuclei containing parallel twin planes remaining are then grown to form tabular silver halide grains. The total grain dispersity of the emulsion is reduced by incorporating bromide ion in the dispersing medium prior to forming the silver halide grain nuclei and, at the time parallel twin planes are formed in the silver halide grain nuclei, a polyalkylene oxide block copolymer surfactant containing at least three terminal lipophilic alkylene oxide block units each linked through a hydrophilic alkylene oxide block linking unit accounting for at least 4 percent of the molecular weight of the copolymer.
    Type: Grant
    Filed: May 14, 1991
    Date of Patent: September 15, 1992
    Assignee: Eastman Kodak Company
    Inventors: Allen K. Tsaur, Mamie Kam-Ng
  • Patent number: 5147771
    Abstract: A process is disclosed of preparing a photographic emulsion containing tabular silver halide grains exhibiting a reduced degree of total grain dispersity. After forming a population of silver halide grain nuclei containing parallel twin planes, a portion of the silver halide grain nuclei are ripened out. The silver halide grain nuclei containing parallel twin planes remaining are then grown to form tabular silver halide grains. The total grain dispersity of the emulsion is reduced by incorporating bromide ion in the dispersing medium prior to forming the silver halide grain nuclei and, at the time parallel twin planes are formed in the silver halide grain nuclei, a grain dispersity reducing concentration of a polyalkylene oxide block copolymer surfactant is present comprised of two terminal lipophilic alkylene oxide block units linked by a hydrophilic alkylene oxide block unit accounting for at least 4 percent of the molecular weight of the copolymer.
    Type: Grant
    Filed: May 14, 1991
    Date of Patent: September 15, 1992
    Assignee: Eastman Kodak Company
    Inventors: Allen K. Tsaur, Mamie Kam-Ng
  • Patent number: 5147773
    Abstract: A process is disclosed of preparing a photographic emulsion containing tabular silver halide grains exhibiting a reduced degree of total grain dispersity. After forming a population of silver halide grain nuclei containing parallel twin planes, ripening out a portion of the silver haide grain nuclei. The silver halide grain nuclei containing parallel twin planes remaining are then grown to form tabular silver halide grains. The total grain dispersity of the emulsion is reduced by incorporating bromide ion in the dispersing medium prior to forming the silver halide grain nuclei and, at the time parallel twin planes are formed in the silver halide grain nuclei, a polyalkylene oxide block copolymer surfactant containing at least three terminal hydrophilic alkylene oxide block units each linked through a lipophilic alkylene oxide block linking unit accounting for at least 4 percent of the molecular weight of the copolymer.
    Type: Grant
    Filed: May 14, 1991
    Date of Patent: September 15, 1992
    Assignee: Eastman Kodak Company
    Inventors: Allen K. Tsaur, Mamie Kam-Ng