Patents by Inventor Mbiya Kapiamba

Mbiya Kapiamba 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: 6638701
    Abstract: Disclosed is a photographic element comprising a a light sensitive silver halide emulsion layer having associated therewith a pyrazolotriazole dye forming coupler having formula I in which is and L1 is linked to the C atom; L1 is a carbon atom of the triazole ring, substituted by one or two alkyl or aryl groups; L2 is a chain of one or two carbon atoms that may be further substituted by alkyl or aryl groups; R1 is selected from the group consisting of alkyl groups containing 1-3 carbon atoms; R2 is selected from the group consisting of hydrogen, alkyl and aryl groups; R3 is a substituted carbonyl, carbamoyl, sulfonyl, or sulfamoyl group; and X is H or a coupling-off group. Such an element provides a red dye forming coupler of improved stability.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: October 28, 2003
    Assignee: Eastman Kodak Company
    Inventors: Mbiya Kapiamba, David G. Lincoln, James L. Edwards, Gary M. Russo, Gregg P. Bryant
  • Patent number: 6521397
    Abstract: Disclosed is a photographic element comprising a support bearing a light sensitive silver halide emulsion layer having associated therewith a dye forming coupler having a formula I, wherein: Ballast is a group containing at least 6 aliphatic carbon atoms, V represents a chain of three or four atoms, which may be substituted, selected from C, N, O and S sufficient to form an aromatic ring fused to the azole ring and n is 0 or 1, provided that if n is 0, Y and Ballast are directly attached to the 5-membered azole ring, W is an electron withdrawing group selected from the group consisting of —CN, —CONR1R2, —CO2R1, —NO2, and —SO2R1 where R1 and R2 are H or substituents; X is H or a coupling-off group; Y is H or a substituent; Z is an atom or group selected from >N—R, —O—, and —S—.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: February 18, 2003
    Assignee: Eastman Kodak Company
    Inventors: Mbiya Kapiamba, Donald R. Diehl, James L. Edwards, David G. Lincoln, Gary M. Russo
  • Patent number: 6197071
    Abstract: Formulations for the oxidation dyeing of keratin fibers comprising a coupler and oxidation base. The couplers are represented by the following structure: wherein: Z represents the elements of C, N, O, or S necessary to complete a substituted or unsubstituted heterocyclic 5 or 6 member ring along with nitrogen; R1 represents a substituent group; and, X represents a hydrogen or a coupling off group.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: March 6, 2001
    Assignee: Eastman Kodak Company
    Inventors: Donald R. Diehl, Mbiya Kapiamba, Stanley W. Cowan
  • Patent number: 6140033
    Abstract: A photographic element comprises novel pyrazolo[5,1-c]-1,2,4-triazole dye forming couplers, the couplers and azomethine dyes. The couplers are represented by the following structure: ##STR1## wherein: Z represents the elements of C, N, O, or S necessary to complete a substituted or unsubstituted heterocyclic 5 or 6 member ring along with nitrogen;R.sub.1 represents a substituent group;and, X represents a hydrogen or a coupling off group.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: October 31, 2000
    Assignee: Eastman Kodak Company
    Inventors: Donald R. Diehl, Mbiya Kapiamba, Stanley W. Cowan