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:
Nov. 16, 1993
Filed:
Apr. 23, 1992
Sundaram Krishnamurthy, Rochester, NY (US);
Thomas A Rosiek, Honeoye Falls, NY (US);
Vincent J Flow, Kendall, NY (US);
David S Bailey, Rochester, NY (US);
David J Giacherio, Rochester, NY (US);
John L Pawlak, Rochester, NY (US);
Stephen P Singer, Spencerport, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Pyrazolone magenta dye-forming couplers having a particular arylthio coupling-off group enhance the photographic properties and improve the manufacturing and handling characteristics of materials and processes employing such couplers. The coupler contains an N-phenyl group, a 3-anilino group and a 4-(arylthio) coupling off group containing a particular aryloxymethylacylamino group as an ortho substituent. A broad range of improvements are realized including stability, reactivity, hue, and dye density in addition to simplified and safer manufacture. The coupler may be represented by the following formula where the substituents and variables are as defined in the specification: ##STR1##