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:
Sep. 03, 1996
Filed:
Oct. 30, 1992
Paul L Stanley, Harrow, GB;
Christina M Watts, Harrow, GB;
Eastman Kodak Company, Rochester, NY (US);
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.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile