Eastman-kodak Company

Cabot Microelectronics Corporation

Sterling Winthrop Inc.

Qed Technologies International, Inc.

Robert O James

Lawrence A Rowley

Ronald Myron Wexler

George L Oltean

Joseph A Verdone

Charles Chester Anderson

Frederick J Jeffers

David C Markham

Bradford D West

Daniel F Hurley

Keith A Walker

Ronald E Uhlig

John N Border

Neil Smith

William Kordonski

Sidney J Bertucci

Vito A DePalma

Arpad Sekeres

Harry J Sherwood

Tomasz Mark Jagielinski

Yongcai Wang

Peter T Aylward

Xin Wen

Debasis Majumdar

Hwei-Ling Yau

Mary Christine Brick

Paul D Yacobucci

Narasimharao Dontula

Lloyd A Lobo

David B Bailey

Catherine A Falkner

Janglin Chen

John F Bishop

Frederick Rockwell Chamberlain, Iv

Kenneth L Tingler

Francisco J Duarte

Joseph S Yudelson

Diane E Kestner

Anne M Miller

Gregory William Keyes

Mary-Irene E Condo

John E Rieth

Linda S Flosenzier

Donald J Majka

Steven J Adamson

John F DeCory

George N Musshafen

Brian S White

Fred John Oleson

Frederick R Chamberlain

Tammy A McCovick

Denis M Bailey

Philip G Walker

Joseph Richard Berry, Jr

John Francis Decory

Greg A Burg

A system for determining magnetic permeability of a material. Two electrical inductors formed as primary and secondary concentric coils share a common magnetic core space. A first AC voltage applied to the primary coil creates a magnetic flux in the core proportional to the magnetic permeability of the material. The magnetic flux induces an AC voltage in the secondary coil indicative of the apparent magnetic permeability of the sample. The apparent permeability is corrected for conductivity by imposing a second AC voltage and resistor in series across first and second electrodes disposed in the material. When the material is a magnetorheological fluid, the magnetic permeability is proportional to the concentration of magnetic particles in the sample and can be back-calculated from the amplitude of the secondary voltage signal.

Method and apparatus for measurement of magnetic permeability of a material

A system for determining the magnetic permeability of a material is provided. Two electrical inductors formed as primary and secondary concentric coils share a common magnetic core space. An AC voltage applied to the primary coil creates a magnetic flux in the core proportional to the magnetic permeability of a sample of the material positioned within the core space. The magnetic flux induces an AC voltage in the secondary coil indicative of the sample magnetic permeability. When the material is a magnetorheological fluid, the magnetic permeability is proportional to the concentration of magnetic particles in the sample and can be back-calculated from the amplitude of the secondary voltage signal. Sensitivity and resolution can be increased by using two identical sets of coils wherein a reference material forms a core for the primary set and the MR fluid sample forms a core for the secondary set.

An ink jet ink composition comprising from about 30 to about 90% by weight of water, from about 0.5 to about 30% by weight of a pigment, from about 0.1 to about 10% by weight of natural or synthetic smectite clay mineral.

Additive for ink jet ink

A nanocomposite optical plastic article has a plastic host material with a temperature sensitive optical vector (x) and a core shell nanoparticulate material dispersed into the plastic host material. The core shell nanoparticulate material is characterized by a core defined by a nanoparticulate material which has a temperature sensitive optical vector (x) and a shell defined by a coating material layer coated onto the core. It is important to the invention that temperature sensitive vector (x) is directionally opposed to the temperature sensitive optical vector (x) and n&#x3c;n&#x3c;n.

Core shell nanocomposite optical plastic article

Method of manufacturing a polymethylmethacrylate core shell nanocomposite optical plastic article

A concentrated fine solid particle dispersion useful for forming a substantially photographically transparent magnetic recording layer is disclosed, comprising an organic solvent medium containing a dispersing agent and dispersed magnetic particles, wherein the magnetic particles are present at a concentration of at least 25% by weight and the organic solvent medium is comprised primarily of organic solvent selected from dimethyl succinate, dimethyl glutarate and dimethyl adipate. This invention provides a stable concentrated dispersion of magnetic particles useful for preparing substantially photographically transparent magnetic recording layers. A film-forming binder solution can be added to dilute the concentrated dispersion, which then can be applied to a support to form a transparent magnetic layer for a magnetic recording element. This invention also provides a photographic element which contains a magnetic recording layer which has excellent magnetic characteristics and which is substantially photographically transparent by virtue of its low granularity and optical density.

Transparent film-forming compositions for magnetic recording

A gain medium for producing a light emission in a laser. The gain medium comprises a dye-doped polymer nanoparticle matrix having an absolute value of dn/dT less than an absolute value of dn/dT of its dye-doped polymer matrix.

Dye-doped polymer nanoparticle gain medium

The invention relates to a waveguide comprising a transparent polymeric central core clad externally with one or more polymeric layers, at least one of the core or clad layer containing layered particles disposed in a polymeric binder, wherein a majority of the particles have a lateral dimension less than 1 micrometer.

Waveguide and method of making same

A method for monitoring the amount of unexposed photographic film remaining in a motion camera film magazine that includes the steps of: providing an unexposed motion picture film containing a support having at least one light sensitive image recording layer and a transparent magnetic recording layer; recording film length data on the transparent magnetic recording layer of the unexposed motion picture film; loading the unexposed motion picture film in a motion picture film magazine; and reading the film length data from the transparent magnetic recording layer as it is removed from the film supply magazine to provide an indication of the amount of unexposed film remaining in the motion picture film magazine. The amount of unexposed film remaining may be displayed in a read-out device associated with the film magazine or camera.

Method for monitoring film remaining in a motion picture film magazine

A process for viewing a motion picture film scene image with concurrently displayed subtitle text comprising: providing a motion picture print film comprising a support bearing at least one light sensitive image recording layer and a transparent magnetic recording layer; printing a negative film scene image onto the motion picture print film to form a positive scene image; recording subtitle information in the magnetic recording layer in synchronization with the scene image; projecting the print film scene image for viewing while simultaneously reading the subtitle information recorded in the magnetic recording layer; and converting the subtitle information to text comprising alphanumeric characters and displaying the subtitle text in conjunction with the projected screen image. One or more language subtitles may be recorded onto and read from a transparent magnetic recording layer on a motion picture film in synchronization with the film image. The subtitle information can be recorded prior to the original release of the film during the printing of the film or can be added to the film at a later time, for example, during re-release of the film in a foreign country. Alternatively, a previously recorded subtitle can be changed for re-release of the copy of the film in another country. The positive motion picture film may be displayed using a motion picture film projector equipped with a magnetic head that reads the subtitle information which is then converted to alphanumeric text and displayed in conjunction with the film image.

Process for viewing a motion picture film with concurrently displayed subtitle text

A particulate magnetic recording media wherein the magnetic particles are substantially spherical. The spherical particle shape makes possible a media which is magnetically isotropic, well dispersed and low in noise, and free of magnetically inferior broken particles.

Spherical magnetic particles for magnetic recording media

A process for viewing a positive motion picture film scene image with an accompanying original audio soundtrack comprising: providing a motion picture origination negative film comprising a support bearing at least one light sensitive image recording layer and a transparent magnetic recording layer; optically recording a motion picture scene in the motion picture negative film by exposing the film in a motion picture camera, and simultaneously recording contemporaneous original audio information in the magnetic recording layer on a frame-by-frame basis in synchronization with the scene image; providing a motion picture print film comprising a support bearing at least one light sensitive image recording layer and a transparent magnetic recording layer; printing the negative film scene image onto the motion picture print film to form a positive scene image, and transferring the original audio information from the magnetic recording layer of the negative film to the magnetic recording layer of the print film in synchronization with the printed scene image, and projecting the print film scene image for viewing while simultaneously reading and playing back the original audio information recorded in the magnetic recording layer. The present invention provides a convenient method to capture, store, and read integral audio information on a frame-by-frame basis in synchronization with a motion picture film image without the need to synchronize two separate media during viewing of the film. Audio information is recording directly onto a motion picture film during filming of a motion picture scene. Both the image and audio information captured during filming can be easily transferred to a motion picture positive film thus allowing to quickly provide synchronous, integral audio information such as dialogue for dailies.

Process for viewing a positive motion picture film scene image with integral audio soundtrack

A coating composition is provided for master media for anhysteretic transfer of magnetically recorded information to a copy medium which comprises from about 59 to about 69% of a magnetic pigment, from about 2.95 to about 6.90% of an abrasive powder, from 0 to about 5.4% of a colloidal inorganic powder, from about 2.9 to about 4.5% of a wetting agent, from about 0.7 to about 3.1% of a lubricant, from about 14.1 to about 33.6% of a binder, at least 85% of which is a polyurethane and from 0.05 to about 15% of which is a polyisocyanate crosslinking agent. The composition is preferably disposed on a substrate backcoated with a composition containing from about 15 to about 25% of carbon black, from about 15 to about 25% of an inorganic filler, from about 0.5 to about 2% of an abrasive, from about 20 to about 30% of a vinyl copolymeric binder, from about 15 to about 25% of a polyurethane binder, from about 7.5 to about 17.5% of an NCO terminated crosslinking agent, from about 0.9 to about 2% of a lubricant, and from about 0.06 to about 0.6% of a coating aid. Master media for anhysteretic recording containing the coating composition of the invention and an anhysteretic duplicating system are also provided as are processes for preparing the coating compositions and master media and for anhysteretic duplication.

Master media for anhysteretic recording

A method of making a magnetically encodable card which comprises forming a dispersion of ferromagnetic particles in an organic fluid medium, forming a composite by intimately combining the dispersion with a thermoplastic resin plasticized by the organic fluid medium and forming the composite into an encodable card.

Method of making a magnetically encodable card having magnetic particles uniformly distributed throughout

The present invention is a photographic element which includes a support having a first side and a second side, at least one light sensitive emulsion layer superposed on the first side of the support, a transparent magnetic layer superposed on the second side of the support. The transparent magnetic layer includes magnetic particles and a film forming binder. An outermost abrasive lubricant layer overlies the transparent magnetic layer. The outermost abrasive lubricant layer is formed from a non-aqueous coating composition of a composite wax particle, an abrasive particle and an organic solvent. The composite wax particle is composed of a wax phase having a wax having a melting point of greater than 30.degree. C. the wax being greater than 80% by weight of the wax phase and a non-crosslinked polymer phase free of chemically bonded acid groups.

Abrasive lubricant layer for photographic element

Growing community of inventors

Rochester, NY, United States of America

Robert O James