1
Philip T S Lau: Photographic emulsions, elements and processes utilizing release compounds. Eastman Kodak Company, Joshua G Levitt, February 3, 1981: US04248962 (139 worldwide citation)

Photographic couplers which release a photographically useful group by an intramolecular nucleophilic displacement reaction can be used in photographic emulsions, elements and processes to provide a photographically useful group in a controlled manner.


2
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.


3
John D Mee: Radiation-cleavable nondiffusible compounds and photographic elements and processes employing them. Eastman Kodak Company, Joshua G Levitt, April 8, 1980: US04197080 (41 worldwide citation)

Radiation-cleavable nondiffusible compounds for providing a transfer dye image are comprised of a spectral sensitizing dye moiety and a diffusible image dye moiety joined to a linkage in the spectral sensitizing dye moiety which is cleaved upon absorption of radiation by the spectal sensitizing dye ...


4
Jared B Mooberry, William C Archie Jr: Blocked photographically useful compounds and photographic compositions, elements and processes employing them. Eastman Kodak Company, Joshua G Levitt, November 9, 1982: US04358525 (36 worldwide citation)

Photographically useful compounds such as photographic reagents and photographic dyes are blocked with a grouping which, under alkaline conditions, is cleaved from the compound by an intramolecular nucleophilic displacement reaction. The compounds are resistant to unblocking under storage conditions ...


5
Chin H Chen: Novel electron donor precursors and photographic element containing them. Eastman Kodak Company, Joshua G Levitt, April 21, 1981: US04263393 (29 worldwide citation)

Novel electron donor precursors have the structure: ##STR1## wherein: Z represents the atoms to complete a mono-, bi- or tricyclic ring system, each ring of which contains 5 to 6 nuclear atoms;


6
Alan G Eeles, Alan D O Neill: Color photographic materials having increased speed. Eastman Kodak Company, Joshua G Levitt, January 22, 1980: US04184876 (28 worldwide citation)

Color photographic materials are disclosed having red-, green- and blue-sensitive silver halide emulsion layer units, which units contain faster and slower emulsion layers for each color sensitivity. In such materials it has been found that increased speed can be obtained by manufacturing the materi ...


7
James A Reczek, Thomas R Welter: Photographic elements and film units containing imidomethyl blocked photographic reagents. Eastman Kodak Company, Joshua G Levitt, September 21, 1982: US04350752 (28 worldwide citation)

Imidomethyl blocked photographic reagents are useful in photographic elements, film units and processes. The blocked photographic reagents have the structure: ##STR1## wherein: J represents ##STR2## X represents the atoms to complete a 5- or 6-membered ring or ring system; R represents hydrogen, alk ...


8
Joseph Bailey, John Cook: Heterocyclic magenta dye-forming couplers. Eastman Kodak Company, Joshua G Levitt, July 6, 1982: US04338393 (25 worldwide citation)

Photographic magenta dye-forming couplers have the general formula: ##STR1## wherein: A represents the atoms necessary to complete, with the nitrogen atom to which it is attached, a magenta dye-forming coupler moiety whose coupling position is inactivated by the --CHR.sup.1 R.sup.2 group;


9
Roy C DeSelms, Jon A Kapecki: Photographic material containing a novel dir-compound. Eastman Kodak Company, Joshua G Levitt, November 1, 1988: US04782012 (19 worldwide citation)

Photographic elements and processes are described which employ compounds capable of releasing, as a function of silver halide development, a deactivatable development inhibitor to provide a combination of desirable sensitometric results. The deactivatable development inhibitor has the structure: ##S ...


10
Paul R West, Jeffery A Gurney: Photopolymerization initiator system comprising a spectral sensitizer and a polycarboxylic acid co-initiator. Eastman Kodak Company, Alfred P Lorenzo, Joshua G Levitt, J Lanny Tucker, May 13, 1997: US05629354 (18 worldwide citation)

Improved photopolymerization initiator systems are comprised of a spectral sensitizer that sensitizes in the ultraviolet or visible regions of the spectrum and an N-aryl, O-aryl or S-aryl polycarboxylic acid co-initiator. The improved initiator systems are incorporated in photo-polymerizable composi ...