Eastman-kodak Company

Johnson & Johnson Clinical Diagnostics, Inc.

Michael R Detty

Jerome H Perlstein

Bruce J Murray

Ralph H Young

John A Sinicropi

James C Fleming

J Robin Cowdery

Susan J Danielson

J Robin Cowdery-Corvan

Lee William Tutt

Mitchell Stewart Burberry

Douglas E Bugner

Rodney Ray Bucks

Franklin D Saeva

Neil F Haley

Michael Scozzafava

Harold T Thomas

Thomas E Goliber

Hsin C Kan

Stephen K Powers

David B Engel

What is disclosed is a dicarboxylic acid oxidation product of a immunologically reactive mono- or a polysaccharide having vicinal diols.

Dicarboxylic acid oxidation products

A sulfone charge transport agent and a multilayered electrophotographic element in which at least one of said layers includes polymeric binder and the sulfone charge transport agent. The general structure of the charge transport agent is: ##STR1## R is alkyl or cycloalkyl having from 1 to about 10 carbons, or aryl or heteroaryl having a total of carbons and heteroatoms of from 6 to about 12. T is alkyl having from 1 to 4 carbons.

Electrophotographic elements and soluble cyclic sulfone electron

Electrophotographic elements containing soluble cyclic sulfone electron

Electrophotographic elements including near-infrared radiation absorbing sensitizers and selected near-infrared radiation absorbing additives exhibit a reduced tendency toward the formation of laser interference patterns. These elements can be utilized in electrophotographic imaging processes including the steps of electrostatically charging the element, imagewise exposing the charged element to near-infrared radiation to form an electrostatic latent image, developing the electrostatic latent image by applying charged toner particles to the element to produce a toned image, and transferring the toned image to a suitable receiver.

Electrophotographic element and imaging method exhibiting reduced

What is disclosed is a ligand analog comprising a dicarboxylic acid oxidation product of a immunologically reactive mono-or a polysaccharide having vicinal diols, to which a label or a support is appended through an amide or thioester linkage.

Ligand analogs for immunoassays derived from dicarboxylic acid oxidation

There is disclosed a recordable optical element that includes a dye. The element has a substrate and on the surface of the substrate, a dye containing recording layer and a light reflecting layer. The dye is a leuco dye which upon exposure to a thermally-generated acid becomes an absorption dye.

Recordable optical element having a leuco dye

There is disclosed a recordable optical element that includes a dye. The element has a substrate and on the surface of the substrate, a dye containing recording layer and a light reflecting layer. The improvement is that the dye is a leuco dye.

Certain chemical compounds, which are aromatic heterocyclic-substituted derivatives of 4H-thiopyran-1,1-dioxide, are electron-transport agents. These compounds exhibit good speed and toe voltage properties in electrophotographic elements.

Aromatic heterocyclic-substituted cyclic sulfone compounds and

There is disclosed an optical retrieval apparatus which uses a laser for illuminating an optical element. A sensor responds to modulated light from the optical element to produce electrical signals. The optical element has a substrate and on the surface of the substrate, a dye containing recording layer and a light reflecting layer. The improvement is that the dye is a leuco dye.

Optical retrieval apparatus using a tellurium (IV) leuco dye

Certain chemical compounds, which are aromatic heterocyclic-substituted derivatives of 4H-thiopyran-1,1,-dioxide given by the formula (I) wherein Het is a substituted or unsubstituted heterocyclic ring system containing at least one 5-membered heterocyclic aromatic ring; and R is an alkyl, aralkyl, or cycloalkyl group of 1 to about 10 carbon atoms, or an aryl group of 6 to about 12 carbon atoms, or a substituted or unsubstituted heterocyclic ring system containing at least one 5-membered aromatic heterocyclic ring, are electron-transport agents. These compounds exhibit good speed and toe voltage properties in electrophotographic elements. ##STR1##

The invention provides a multiactive electrophotographic element comprising an electrically conductive substrate, a charge generation layer, and a charge transport layer, wherein the charge transport layer contains an electron transport agent having the structure: ##STR1## wherein J is H, Cl, Br, alkyl, alkoxy, aryl, or aryl further substituted with halo or alkyl; and wherein R is styryl, aryl, or heteroaryl in which the hetero atom is S or O, each of which R is unsubstituted or further substituted with alkyl, halo, alkoxy, nitro, hydroxy, cyano, trifluoromethyl, alkylsulfonyl, arylsulfonyl, alkoxycarbonyl, amino, alkylamino, dialkylamino, arylamino, or alkylarylamino. Such an element exhibits a good combination of electrophotographic performance properties.

Multiactive electrophotographic elements containing electron transport

This invention relates to a dye donor element for laser-induced thermal dye transfer comprising a support having thereon a dye layer comprising an image dye in a binder and an infrared-absorbing material associated therewith, and wherein the infrared-absorbing material is a telluro- or seleno-squarylium dye having the following formula: ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently represents hydrogen or a substituted or unsubstituted alkyl, aryl or hetaryl group;

IR absorber for laser-induced thermal dye transfer

A process for detecting the presence of living cells suspended in an aqueous medium preferably at a nearly neutral pH, which comprises:

Detecting cells using tellurapyrylium dihydroxides

There are disclosed pyrylium salts and a method of using them medicinally in photodynamic therapy for increasing the survival time of animals affected with glioma or mammary carcinoma. The salts are seleno- or telluropyrylium compounds having a singlet oxygen quantum efficiency of at least 0.005 when exposed as described at wavelengths between about 650 and 1000 nanometers.

Photodynamic therapy of glioma or mammary carcinoma using seleno- or

Unsymmetrical tellurapyrylium dyes can be ungraded in purity by separating them from symmetrical analogs produced as co-products. The procedure employed for the purification comprises an oxidative halogenation, followed by a fractional crystallization, and a reduction to regenerate the tellurapyrylium dye.

Growing community of inventors

Rochester, NY, United States of America

Michael R Detty