The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 2005
Filed:
Jun. 27, 2003
Albert J. Mura, Jr., Rochester, NY (US);
Gary M. Russo, Rochester, NY (US);
J. Ramon Vargas, Rochester, NY (US);
Shari L. Eiff, Rochester, NY (US);
Albert J. Mura, Jr., Rochester, NY (US);
Gary M. Russo, Rochester, NY (US);
J. Ramon Vargas, Rochester, NY (US);
Shari L. Eiff, Rochester, NY (US);
Other;
Abstract
Photographic elements are disclosed comprising a silver halide emulsion layer having associated therewith a dye forming coupler and a compound of the following Formula I:RRN—C(O)—(R)—C(O)—NRRwherein R represents a hydrocarbon linking group; p=0 or 1; and each of R, R, Rand Rindependently represents an aromatic, cyclic, linear or branched chain hydrocarbon group, or Rand Ror Rand Rcombine together to form a ring with the associated nitrogen atom to which they are attached; with the proviso (i) at least one of R, R, Rand Rcomprises an aromatic, cyclic, secondary alkyl, or otherwise or branched hydrocarbon group, or (ii) at least Rand Ror Rand Rcombine together to form a ring with the associated nitrogen atom. Photographic elements of the present invention upon exposure and photographic processing exhibit good activity and yield dye images that have unexpected and substantial improvements in the stability of the formed image dyes.