1
Philip T S Lau: Cyan dye-forming couplers. Eastman Kodak Company, Joshua G Levitt, June 8, 1982: US04333999 (54 worldwide citation)

Novel phenolic cyan dye-forming couplers contain in the 2-position a p-cyanophenylureido group. These couplers are useful in photographic emulsions, elements and processes.


2
Kenneth N Kilminster, David Hoke: Cyan dye-forming couplers and photographic materials containing same. Eastman Kodak Company, Thomas F Kirchoff, October 4, 1988: US04775616 (23 worldwide citation)

Novel phenolic cyan dye-forming couplers contain a p-cyanophenylureido group in the 2-position and in the 5-position an acylamino substituent containing a sulfone group having bulky substituents sufficient to provide steric interaction within the coupler molecule and the dye molecule derived therefr ...


3
David Hoke, Kenneth N Kilminster: Cyan dye-forming couplers and photographic materials containing same. Eastman Kodak Company, Thomas F Kirchoff, July 18, 1989: US04849328 (21 worldwide citation)

Novel phenolic cyan dye-forming couplers are disclosed. The coupler compounds contain a p-cyanophenylureido group in the 2- position and an acylamino group in the 5- position of the phenolic ring. The acylamino group contains bulky substituents to provide steric interaction within the coupler molecu ...


4
Yoneyama Hiroyuki: Silver halide color photographic light-sensitive material.. Fuji Photo Film, January 12, 1994: EP0578248-A2 (18 worldwide citation)

There is disclosed a silver halide color photographic light-sensitive material capable of providing a dye image having excellent color reproducibility, sharpness and image fastness. The light-sensitive material comprises a support having provided thereon a photographic constituent layer comprising a ...


5
Lau Philip Thiam Shin: Photographic couplers, emulsions, materials and processes.. Eastman Kodak Co, May 6, 1981: EP0028099-A1 (17 worldwide citation)

Phenolic cyan dye-forming couplers of the general formula: wherein X is hydrogen or a coupling-off group and R is a ballast group, are useful in photographic emulsions, materials and processes. The cyan dyes prepared when such couplers are reacted with oxidized aromatic primary amino colour developi ...


6
David Hoke: Photographic materials with novel cyan dye forming couplers. Eastman Kodak Company, Joshua G Levitt, September 3, 1991: US05045442 (15 worldwide citation)

Photographic materials contain cyan dye forming couplers having good ethyl acetate solubility. The coupler contains a coupling off group with an asymmetric carbon atom. Manufacture of the material is simplified and in some instances the activity of the coupler is increased.


7
Ping W Tang, Thomas H Jozefiak, David J Decker: Photographic elements with heterocyclic cyan dye-forming couplers. Eastman Kodak Company, Joshua G Levitt, August 15, 1995: US05441863 (12 worldwide citation)

Novel imidazo[3,2-a]imidazole cyan dye-forming couplers and photographic elements containing them are described. The couplers are represented by the following structure: ##STR1## wherein: EWG.sub.1 and EWG.sub.2 each independently represent an electron withdrawing group;


8
Ivano Delprato: Cyan dye-forming couplers and photographic elements and processes. Minnesota Mining and Manufacturing Company, Donald M Sell, James A Smith, Mark A Litman, May 27, 1986: US04591548 (7 worldwide citation)

Cyan dye-forming 6-hydroxy-2H-1,4-benzoxazin-3-(4H)-one couplers, preferably cyan dye-forming couplers corresponding to the general formula: ##STR1## wherein R represents hydrogen or R'"--X--NH, R' represents hydrogen or a substituted or unsubstituted alkyl group, R" represents hydrogen or R.sup.iv ...


9
Paul Leo Zengerle, Allan Francis Sowinski: Cyan coupler dispersion with increased activity. Eastman Kodak Company, Andrew J Anderson, March 10, 1998: US05726003 (5 worldwide citation)

Silver halide photographic light-sensitive elements comprising a support having coated thereon a coupler dispersion containing layer comprising phenolic cyan dye forming couplers of Formula I and a high boiling organic solvent of Formulas II-V as defined in the specification, wherein the weight rati ...


10
Hiroyuki Yoneyama: Silver halide color photographic light-sensitive material. Fuji Photo Film, Sughrue Mion Zinn Macpeak & Seas, November 15, 1994: US05364748 (5 worldwide citation)

There is disclosed a silver halide color photo-graphic light-sensitive material capable of providing a dye image having excellent color reproducibility, sharpness and image fastness. The light-sensitive material comprises a support having provided thereon a photographic constituent layer comprising ...