Patents by Inventor Christina M. Watts

Christina M. Watts 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: 6238855
    Abstract: A photographic element comprising a support bearing one or more silver halide emulsions at least one of which comprises at least 50% silver chloride in association with one or more image dye-forming couplers and one or more DI(A)R couplers of formulae I or II: wherein: TIME is a timing group and R1, R2, Z, n, and j are as defined in the specification, wherein the DI(A)R coupler(s) in association with an emulsion comprising at least 50% silver chloride comprise at least about 25% to about 90% of the total amount of coupler in association with that emulsion and the total amount of coupler is the sum of the number of moles of image coupler(s) and the number of moles of the DI(A)R couplers in association with that emulsion.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: May 29, 2001
    Assignee: Eastman Kodak Company
    Inventors: Philip A. Allway, Christina M. Watts, Paul L. Stanley
  • Patent number: 6010837
    Abstract: The invention provides a photographic element comprising a silver halide emulsion layer having associated therewith an image dye-forming coupler of formula (I): ##STR1## wherein X is H or a coupling-off group, R is H; or R, R.sub.1 and R.sub.2 are the same or different and are coupler-modifying functional groups (with the provisos that (a) the moiety N(R.sub.1)COR.sub.2 may not be a carbamate, ureido or imido and (b) R.sub.1 and R.sub.2 may not both be phenyl or substituted phenyl); or R.sub.1 and R.sub.2 taken together with the nitrogen atom and the carbonyl group form a 5-10 membered heterocyclic ring which may contain one or more further heteroatoms selected from N, O and S, said heterocyclic ring being unsubstituted or substituted with one or more coupler-modifying functional groups, with the proviso that the ring is not a cyclic carbamate, ureido or imido; and wherein the coupler forms a dye with a peak absorption less than 565 nm.
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: January 4, 2000
    Assignee: Eastman Kodak Company
    Inventors: Bernard A. Clark, Michael W. Crawley, Jane S. Boff, Christina M. Watts, Stephen P. Singer, Paul L. Stanley
  • Patent number: 5552266
    Abstract: The combination of a magenta dye image-forming coupler, such as a phenylpyrazolone, with a substituted phenol in a photographic material provides an enhancement in the light stability of the resultant magenta image dye.The phenol has the formula (I): ##STR1## wherein each R is the same or different and is an unsubstituted or substituted alkyl, halogen, cyano, SO.sub.2 R.sup.1, SO.sub.2 NHR.sup.1, NHSO.sub.2 R.sup.1 or COOR.sup.1 group, in which R.sup.1 is an unsubstituted or substituted alkyl or aryl group and n is from 1 to 5.The phenol may totally or partially replace the conventional coupler solvent. The combination is useful in single colour or multi-colour photographic silver halide emulsion materials and processes.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: September 3, 1996
    Assignee: Eastman Kodak Company
    Inventors: Paul L. R. Stanley, Christina M. Watts