Eastman-kodak Company

Minnesota Mining and Manufacturing Company

Johnson & Johnson Clinical Diagnostics, Inc.

Wayne W Weber, Ii

Donald W Heseltine

Robert E Dickerson

Steven G Link

Ronald E Leone

Richard B Anderson

Donald P Wrathall

Fred M Macon

Richard L Parton

Margaret Elizabeth Logan

Gladys L MacIntyre

Calvin Roman Messing

Diaza-18-crown-6 compounds of the formula I: ##STR1## wherein X is a phenol, naphthol or quinolinol moiety selected from those of the formulae: ##STR2## R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are independently selected from hydrogen, halo, cyano, nitro, (C.sub.1 -C.sub.6) alkyl, (C.sub.2 -C.sub.8) acyl, acetamido, mercapto, alkyl or arylsulfonyl, trifluoromethyl, aryl, and substituted aryl wherein the aryl moiety is selected from phenyl and naphthyl and the aryl substituent is selected from halo, cyano, nitro, (C.sub.1 -C.sub.6) alkyl, (C.sub.2 -C.sub.8) acyl, phenyl, acetamido, mercapto, alkyl or arylsulfonyl and trifluoromethyl; provided that when R.sub.1, R.sub.2, R.sub.3 and R.sub.5 are hydrogen and X is phenol, R.sub.4 is not nitro; and provided that when X is phenol and R.sub.5 is hydrogen, R.sub.1 (or R.sub.2) and R.sub.4 are not both nitro. Compounds of the above formula are useful as chromoionophores for the detection of calcium ions in solution or dry assays, but are of particular advantage when used in dry, thin-film multilayer analytical elements.

Calcium specific diaza-18-crown-6-ether chromoionophores

UV-sensitive negative acting silver halide photographic elements are used in contacting processes, and especially dry etch correction processes and can be safely handled under white light. These elements comprise a support base, a negative acting hydrophilic colloidal silver halide emulsion layer comprising photographic silver halide grains, and one or more hydrophilic colloidal layers, wherein said silver halide emulsion support base has on its surface most distant from the layer an antihalation layer comprising a water-removable UV-absorbing compound having significant absorption in the range of from 350 to 400 nm.

White light handleable negative-acting silver halide photographic

Dyes of formula (I) below are described. The dyes are useful as mid-green sensitizing dyes for photographic materials ##STR1## In the above formula, R1 and R3 are methyl or ethyl, at least one of R1 and R3 being methyl. R2 and R4 are substituted or unsubstituted C.sub.1 to C.sub.6 alkyl, provided that R2 and R4 are not both methyl. X1, X2, X3, and X4 are each independently methyl, methylthio, fluoro-substituted methyl or methylthio, or hydrogen, provided that at least one of X1 and X2 and at least one of X3 and X4 are not hydrogen. Y represents an ion as needed to balance the charge of the molecule. The dyes of formula (I) sensitize silver halide to light in the mid-green region of the spectrum.

Mid-green sensitizing dyes for photographic materials

A radiographic element is disclosed comprised of a transparent film support and spectrally sensitized tabular grain silver halide emulsion layer units coated on opposite sides of the film support. At least one of the emulsion layer units is comprised of tabular grains having a thickness of less than 0.2 micrometer accounting for greater than 50 percent of total grain projected area and exhibiting an average tabularity of greater than 25. Adsorbed to the surface of the tabular grains is at least one benzimidazolocarbocyanine dye chosen for its high level of absorption in the mid-green spectral region at the emission line of gadolinium oxysulfide, terbium activated intensifying screens and its low residual stain in the fully processed film.

Tabular grain emulsion containing radiographic elements exhibiting

Sensitizing dyes for photographic materials are disclosed. The dyes have the formula: ##STR1## Z.sub.1 represents the atoms necessary to complete a benzoxazole nucleus, a benzothiazole nucleus, a benzoselenazole nucleus, a benzotellurazole nucleus, or a benzimidazole nucleus, which, in addition to being substituted by R.sub.3, may be further substituted or unsubstituted,

Sensitizing dye for photographic materials

Novel UV absorbing compounds and photographic elements containing UV

1-Amino-4-cyano-1,3-butadiene compounds of the formula ##STR1## WHEREIN N IS 1 OR 2, WHEN N IS 1 R.sub.1 and R.sub.2 can be the same or different and represent hydrogen, alkyl including substituted alkyl, aryl including substituted aryl or cyclic alkyl groups, except that both R.sub.1 and R.sub.2 cannot be hydrogen, or taken together R.sub.1 and R.sub.2 represent the elements necessary to complete a cyclic amino group and when n is 2 at least one of R.sub.1 and R.sub.2 is alkylene or arylene; G represents an electron withdrawing group. The compounds are especially useful in photographic elements as UV absorbers.

Photographic nucleating agents are disclosed of the formula ##STR1## wherein R is a hydrogen, phenyl, alkylphenyl, cyanophenyl, halophenyl, alkoxyphenyl, alkyl, cycloalkyl, haloalkyl, alkoxyalkyl or phenylalkyl substituent;

Acyl hydrazino thiourea derivatives as photographic nucleating agents

A radiation-sensitive composition is disclosed including silver halide grains capable of forming an internal latent image and an acylhydrazinophenylthiourea nucleating agent. This composition can be used as a coating on a support to form a photographic element.

Growing community of inventors

Honeoye Falls, NY, United States of America

Wayne W Weber, Ii