Patents by Inventor Cuong Ly

Cuong Ly 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).

  • Color photographic silver halide material
    Patent number: 6045989
    Abstract: A color photographic silver halide material having a support and at least one light-sensitive silver halide emulsion layer, the silver halide of which consists of at least 95 mole % of AgCl, and which contains a magenta coupler of formula (I) whereinR denotes H or a group which is split off under the conditions of chromogenic development,R.sub.1 denotes alkyl, which is optionally substituted, andR.sub.2 denotes R.sub.1 or aryl,wherein the sum of all the C atoms of the R.sub.1 and R.sub.2 radicals in a coupler molecule is at least 12, and wherein the silver halide contains mercury, is distinguished by improved latent image stability.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: April 4, 2000
    Assignee: Agfa-Gevaert NV
    Inventors: Cuong Ly, Ralf Weimann
  • Color photographic silver halide material
    Patent number: 5919612
    Abstract: A colour photographic silver halide material having a support and at least one silver halide emulsion layer, which contains a sensitiser of the formula (I), a stabiliser of the formula (II) and a stabiliser of the formula (III) ##STR1## in which R.sub.1 to R.sub.14, X.sub.1, X.sub.2, X.sup..crclbar., L.sub.1 to L.sub.5 and n have the meaning stated in the description, is distinguished by improved storage stability.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: July 6, 1999
    Assignee: Agfa-Gevaert AG
    Inventors: Cuong Ly, Wolfgang Schmidt, Bruno Mucke, Michael Missfeldt
  • Color photographic silver halide material
    Patent number: 5679508
    Abstract: A color photographic silver halide with a support and at least one silver halide emulsion layer, the silver halide of which is stabilized by compounds I and II, is distinguished by reduced storage fog combined with stronger gradation: ##STR1##
    Type: Grant
    Filed: February 26, 1996
    Date of Patent: October 21, 1997
    Assignee: AGFA-Gevaert AG
    Inventors: Bruno Mucke, Cuong Ly, Wolfgang Schmidt
  • Color photographic silver halide material
    Patent number: 5354649
    Abstract: A color photographic silver halide material in which at least one silver halide emulsion consists of 85 to 99 mol-% AgCl, 1 to 10 mol-% AgI and 0 to 5 mol-% AgBr has high sensitivity (camera sensitivity) and can be developed in at most 120 s.
    Type: Grant
    Filed: August 4, 1993
    Date of Patent: October 11, 1994
    Assignee: Agfa Gevaert Aktiengesellschaft
    Inventors: Peter Bell, Jurgen Haekel, Cuong Ly, Reinhart Matejec, Ralf Wichmann
  • Photographic silver halide material
    Patent number: 5270157
    Abstract: A colour photographic silver halide material having at least one silver halide emulsion layer which contains at least one colour coupler and in which the silver halide grains contain from 40 to 90 mol. % of AgCl and at least two zones differing in halide composition, the chloride content of the outer zone being at least 10 mol. % higher than that of the inner zone, which silver halide emulsion layer is associated with a DIR compound whose reaction with the oxidized colour developer has a rate constant k>2000 [1/mol.s] is distinguished by excellent sharpness and colour reproduction even when processed by a high speed process.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: December 14, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Bell, Cuong Ly