Eastman-kodak Company

Philip A Allway

Stephen P Singer

Louis Elbert Friedrich

Bernard A Clark

Paul L Stanley

Charles E Heckler

James A Friday

John Demita Goddard

David S Ross

Tania Zuberi

Marcello Vitale

David B Bailey

Tienteh M Chen

Trevor J Wear

Jane Sarah Boff

Christina M Watts

Judith A Bogie

Siu (Lambert) C Tsoi

The invention provides a color photographic element comprising at least one light-sensitive silver halide emulsion layer or a non silver-containing light-insensitive layer, in which at least one of these layers contains a colorless imidazole compound of formula (I) that undergoes less than 10% chemical or redox reaction with oxidized developer and which enables the photographic speed of the element to be increased by at least 0.05 stop without increasing granularity, compared to the same element without the compound, wherein the compound of formula (I) has the structure: wherein

Photographic element containing a speed-enhancing compound

The invention provides a color photographic element comprising at least one light-sensitive silver halide emulsion layer or a non silver-containing light-insensitive layer, in which at least one of these layers contains a colorless heterocyclic compound having either one or two hetero atoms in the ring or ring system, being other than an imidazole compound, that undergoes less than 10% chemical or redox reaction directly with oxidized developer and which has a partition coefficient to enable the photographic speed of the element to be increased by at least 0.03 stop without increasing granularity, compared to the same element without the compound. The heterocyclic compounds increase speed without a concomitant increase in size of the light-sensitive silver halide grains.

Photographic element with speed-enhancing compound

The invention relates to a novel kind of anthranilic acid compound that releases a UG as a function of chemical bond cleavage according to Formula (I):Q-(AAS)-UGwhere UG is an useful group and is chemically bonded to (AAS); (AAS) is an anthranilic acid switching group; and Q is a group in which the bond to (AAS) is broken so that the -(AAS)-UG fragment subsequently decomposes to the free UG. In one embodiment this invention relates to a multilayer silver halide photographic element comprising a support bearing a cyan dye image-forming unit comprised of at least one red-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler, a magenta dye image-forming unit comprising at least one green-sensitive silver halide emulsion layer having associated therewith at least one magenta dye-forming coupler, and a yellow dye image-forming unit comprising at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler, wherein at least one layer additionally contains an anthranilic acid compound according to Formula (II):G-(TG1)-(AATG)-(TG2)-PUGwhere G is a group in which the bond to the timing group is cleaved upon reaction with oxidized developer; TG1 and TG2 represent any known timing or switching group and may be the same or different; q and p are independently 0 or 1; AATG represents an anthranilic acid timing group and PUG is a photographically useful group.

Compound containing an anthranilic acid blocking group

Disclosed is a color photographic element comprising at least one light sensitive silver halide emulsion layer containing a compound that does not react with oxidized developer, has a Log Kow high enough to improve speed, compared to the same layer without the compound, and comprises

Color photographic element containing improved heterocyclic speed enhancing compound

Color photographic element containing a heterocyclic dye-forming coupler

Color photographic element containing speed-improving benzotriazole polymer

Disclosed is a color photographic element comprising at least one of (1) a light sensitive silver halide emulsion layer and (2) a non-silver containing light insensitive layer, said at least one layer containing a compound with a minimum of three heteroatoms that does not react with oxidized developer and that has a ClogP sufficient to increase the photographic speed of said element compared to the same element without the compound. The invention provides improved light sensitivity.

Color photographic element containing speed improving compound

Color photographic element containing speed-improving polymers

Color photographic element containing nitrogen heterocycle derivative and inhibitor releasing coupler

A photographic element comprising a support bearing one or more silver halide emulsions at least one of which comprises at least 50% silver chloride in association with one or more image dye-forming couplers and one or more DI(A)R couplers of formulae I or II:

Photographic element containing a DIR coupler

Color photographic element containing a coupler releasing derivative with at least three heteroatoms with specific hydrophobicity

The invention provides a silver halide photographic element comprising a non-light sensitive layer containing elemental silver and a nitrogen heterocycle compound having a ClogP of at least 4.5, which compound comprises a ring system of one or more fused rings containing at least one --N--H bond, the ring system comprising a total of at least three nitrogen ring members and the associated bonds; provided that the compound does not contain an --SH group or &gt;C.dbd.S group and does not react with an oxidized developer.

Color photographic element containing elemental silver and nitrogen

The present invention describes an image dye-forming coupler of formula (I) ##STR1## wherein L is an oxymethylene or oxycarbonyl group; n is 0 or 1; COUP is a coupler moiety and R.sub.1 and R.sub.2 are the same or different and are groups selected such that

Photographic couplers which release useful groups anchiomerically and

The present invention provides a photographic element comprising a support, at least one photosensitive silver halide layer and in or adjacent said silver halide layer a colour coupler of one of the general formulas: ##STR1## wherein R.sup.1 is a subsituted or unsubstituted aryl or a subsituted or unsubstituted heterocylic group,

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Hertfordshire, United Kingdom

Philip A Allway