Eastman-kodak Company

Carestream Health, Inc.

Yun C Chang

Joe E Maskasky

Rajesh Vinodrai Mehta

Eric R Schmittou

Jon N Eikenberry

Lois A Buitano

Jerzy A Budz

Joseph P Pepe

Roger L Lok

Seshadri Jagannathan

Thomas B Brust

David H Foos

Kenneth Joseph Reed

Samuel Chen

James A Friday

John Yorkston

Donald L Black

Tiecheng A Qiao

Annabel A Muenter

Peter Jerome Cowdery-Corvan

Allen K Tsaur

Gary L House

Jerome Robert Lenhard

Michael G Antoniades

Sherrill A Puckett

Debra L Hartsell

Donna J McPhillips

Thomas I Penner

Pierre-Henri Jezequel

H Glenn Judd

James Rodgers

This invention relates to a composition of matter comprising associated predominantly silver nanoparticles, and a method of making the nanoparticles. It further relates to articles comprising the nanoparticles.

Silver nanoparticles made in solvent

Apparatus for acquiring an elongated radiographic image. The apparatus includes a flat panel electronic detector of radiographic images, the detector having a known length; and a transport mechanism for mounting the detector for movement in a direction parallel to the known length so that the detector can be positioned in sequential contiguous partially-overlapping positions to acquire a radiation image greater in length than the detector length. At least one marker is disposed in a region corresponding with each partially-overlapping position of the detector.

Method and system for acquiring full spine and full leg images using flat panel digital radiography

The present invention relates to a method of particle separation comprising preparing a suspension of particles containing at least one recognizable target particle in a suspending solution, labeling the target particle with a conjugate marker, wherein the conjugate marker comprises at least one recognition unit for the recognizable target particle and at least one peroxidase enzyme, contacting a gelatin surface with the suspending solution, adding developer to the suspending solution in contact with the gelatin surface and in the presence of phenol to attach the target particle to the gelatin surface, and washing the gelatin surface to remove unattached particles. The method may also include detecting the presence of the target particle on the gelatin surface as well as detaching and recovering the attached particles after removal of the non-target particles.

Method and system for sorting and separating particles

Core/shell emulsions with enhanced photographic response

Fragmentable electron donor compounds combined with broad blue spectral sensitization

A high chloride {100} tabular grain emulsion is prepared by creating grain nuclei containing greater than 45 mole percent bromide. Growth onto the grains under conditions favorable for high chloride {100} grain growth is conducted while maintaining (a) a temperature in the range of from 25 to 85.degree. C., (b) a pH in the range of from 3.5 to 8.5, and (c) a vAg in the range of from 120 to 200 mV. Crystal lattice field distortions are observed at the nucleation site, and the nucleation site exhibits the maximum bromide concentration, which is greater than 5 mole percent, based on silver at the site.

Simplified nucleation of high chloride &lt;100&gt; tabular grain emulsions

The invention relates to a method of forming a silver halide emulsion comprising nucleating silver bromide nuclei while reactive contact with ammonia, a digestion said nuclei, bringing a thioether into reactive contact with said nuclei, growing the nuclei by addition of silver ion, iodide and bromide, wherein during at least the first portion of growth, the pH is maintained at about 9.

Mixed ripeners for silver halide emulsion formation

A radiation-sensitive emulsion is disclosed in which at least 70 percent of total grain projected area is accounted for by tabular grains (a) having {100} major faces, (b) containing greater than 50 mole percent chloride, based on silver, (c) having a mean equivalent circular diameter in the range of from 2.0 to 5.0 .mu.m, and (d) exhibiting a mean thickness of 0.1 .mu.m or less. The emulsion is prepared by (a) precipitating up to 10 percent of the total silver forming the high chloride {100} tabular grains to create a first grain population under conditions that form a crystal lattice structure that favors the growth of high chloride {100} tabular grains, (b) thereafter rapidly introducing silver and halide ions to create a second grain population, and (c) growing the first grain population to create the high chloride {100} tabular grains by ripening out the second grain population.

High chloride (100) tabular grain emulsions containing large, thin

The invention relates to a method for emulsion formation comprising providing a source of silver nitrate and a source of alkali halide bringing said sources together in a vessel, in the vessel measuring silver and each halide ion concentration, utilizing said measurements to determine what is the composition of the silver halide particles in said vessel, and controlling the sources of halide and nitrate to control said particles composition.

Method for forming silver halide grains with measurement of ion

A radiation-sensitive emulsion is disclosed in which greater than 50 percent of total grain projected area is accounted for by tabular grains (a) having {100} major faces, (b) containing greater than 50 mole percent chloride, based on silver, (c) having a mean equivalent circular diameter in the range of from 2.0 to 5.0 .mu.m, and (d) exhibiting a mean thickness of 0.1 .mu.m or less. The emulsion is prepared by (a) precipitating up to 10 percent of the total silver forming the high chloride {100} tabular grains to create a first grain population under conditions that form a crystal lattice structure that favors the growth of high chloride {100} tabular grains, (b) thereafter rapidly introducing silver and halide ions to create a second grain population, and (c) growing the first grain population to create the high chloride {100} tabular grains by ripening out the second grain population.

The invention relates to a method of sensitizing (111) high chloride tabular grains having {111} major faces comprising providing the high chloride tabular grains, and sensitizing using temperatures greater than 70.degree. C.

Chemical and spectral sensitization of high-chloride tabular grains

An improved preparation of high chloride {100} tabular grain emulsions that relies on iodide ions to produce tabular grain growth is disclosed. By delaying iodide ion introduction until after the initiation of grain nucleation the proportion of total grain projected area accounted for by high chloride {100} tabular grains is increased. The projected areas of the {100} tabular grains can exceed 95 percent of total grain projected area.

High chloride [100] tabular grain emulsions improved emulsions and

Silver halide emulsions are disclosed in which at least 50 percent of total grain projected area is accounted for by tabular grains (1) bounded by {100} major faces having adjacent edge ratios of less than 10, (2) each having an aspect ratio of at least 2, and (3) internally at their nucleation site containing iodide and at least 50 mole percent chloride. The emulsions are prepared by a process comprised of the steps of (a) introducing silver and halide salts into a dispersing medium so that nucleation of the tabular grains occurs in the presence of iodide with chloride accounting for at least 50 mole percent of the halide present in the dispersing medium and the pCl of the dispersing medium being maintained in the range of from 0.5 to 3.5 and (b) following nucleation completing grain growth under conditions that maintain the {100} major faces of the tabular grains.

High chloride tabular grain emulsions and processes for their preparation

A process is disclosed of preparing an emulsion comprised of dispersing medium and folded tabular grains containing at least 95 mole percent chloride, based on total silver. This is achieved by maintaining a chloride ion concentration of at least 0.5 molar in the dispersing medium while the grain nuclei are being formed and during grain growth maintaining in the dispersing medium a pH in the range of from 1 to 8 and an effective concentration of 2-hydroaminoazine or xanthinoid morphological modifier in the range of from a 5.times.10.sup.-5 to 2.times.10.sup.-2 millimolar concentration.

High chloride folded tabular grain emulsions

A process of preparing a radiation sensitive high chloride high aspect ratio tabular grain emulsion is disclosed wherein silver ion is introduced into a high methionine gelatino-peptizer dispersing medium having a methionine content of greater than 30 .mu.moles/gram gelatin, containing a stoichiometric excess of chloride ions of greater than 0.5 molar, a pH of at least 4.5, and a 4,6-di(hydroamino)-5-aminopyrimidine grain growth modifier, such as adenine or 4,5,6 triaminopyrimidine.

Growing community of inventors

Rochester, NY, United States of America

Yun C Chang