Patents by Inventor Roland G. Willis

Roland G. Willis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5441853
    Abstract: A method of making a photographic color print using a photographic color material containing low levels of silver halide characterized in that,(a) after image formation and washing and/or stop bath treatment and(b) before non-uniform exposure to adventitious light,the print is uniformly exposed to a light source so that undeveloped silver halide is caused to print out uniformly. Such a uniform density is much more acceptable than a non-uniform density caused by uneven light in normal conditions.
    Type: Grant
    Filed: November 26, 1993
    Date of Patent: August 15, 1995
    Assignee: Eastman Kodak Company
    Inventors: John R. Fyson, Roland G. Willis
  • Patent number: 5411840
    Abstract: A method of forming chromogenic photographic image comprising the steps of:providing an aqueous developable photographic element coated on a single dimensionally stable support, wherein said element comprises in reactive association (1) a developing agent, where said developing agent is a primary amine or a precursor of a primary amine, (2) radiation sensitive silver halide, (3) a color coupler compound that forms or releases a dye upon reaction with the oxidation product of a primary amine developing agent, and (4) a hydrophilic binder;exposing said element to actinic radiation; anddeveloping said image by contacting said element with an applied volume of an aqueous processing solution, wherein said applied volume is limited to less than 800% of the swell volume of said element in equilibrium-mechanical contact with said processing solution or the temporal duration of said contacting is limited to a time less than 500% of the time necessary for said element to swell to 90% of said swell volume.
    Type: Grant
    Filed: December 21, 1992
    Date of Patent: May 2, 1995
    Assignee: Eastman Kodak Company
    Inventors: John Texter, Roland G. Willis
  • Patent number: 5270145
    Abstract: A process for forming a dye image including the steps of: (a) exposing a photographic element comprising a light sensitive silver halide emulsion layer containing a color coupler compound capable of forming a heat transferable dye upon development; (b) developing the exposed element resulting from step (a) with a color developer solution to form a heat transferable dye image; (c) heating the exposed, developed element resulting from step (b) to thereby transfer the dye image from the emulsion layer to a dye receiving layer which is part of the photographic element or part of a separate dye receiving element brought into contact with the photographic element; and (d) separating the emulsion layer from the dye receiving layer containing the transferred dye image; wherein the color coupler compound is of the following formula (I):COUP--B (I)wherein COUP represents a coupler moiety capable of forming a heat transferable dye upon reaction of the coupler compound with an oxidized product of the developing solution
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: December 14, 1993
    Assignee: Eastman Kodak Company
    Inventors: Roland G. Willis, John Texter
  • Patent number: 5164280
    Abstract: The invention is generally accomplished by a method wherein a dry photographic image is formed in an imaging-forming donor layer. The formed image is allowed to diffuse to a receiver layer. A dry acceptor layer is brought into contact with the image-forming layer and then separated such that the image-forming layer is adhered to the acceptor layer. It is preferred that the contact of the acceptor layer and the image-forming layer is under heat and pressure and the preferred material for both layers is dry gelatin.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: November 17, 1992
    Assignee: Eastman Kodak Company
    Inventors: John Texter, William B. Travis, Roland G. Willis
  • Patent number: 4933273
    Abstract: A photographic element and emulsion are described which comprise a negative working silver halide emulsion layer, a hydrazine compound nucleating agent and an electron accepting antifogging dye. Enhanced sensitometric properties are obtained. A process for developing such element or emulsion is also described.
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: June 12, 1990
    Assignee: Eastman Kodak Company
    Inventors: Paul B. Gilman, Jr., Thaddeus D. Koszelak, Anthony Adin, Roland G. Willis
  • Patent number: 4764444
    Abstract: A color transfer imaging element comprising a support having thereon an imaging layer comprising a thermographic, photothermographic, or electrographic material capable of forming an image which absorbs or scatters light or infrared radiation, and a dye layer from which a dye image can be transferred to an image receiver when the imaging element is overall exposed to radiation that is absorbed or scattered by the imaged areas of the imaging layer, thereby causing imagewise heating of the dye. The dye layer is positioned relative to the other layers so as to allow this imagewise transfer of dye to the image receiver.
    Type: Grant
    Filed: October 16, 1986
    Date of Patent: August 16, 1988
    Assignee: Eastman Kodak Company
    Inventors: Michael J. Simons, Roland G. Willis, Donald M. Harvey
  • Patent number: 4235957
    Abstract: In a dry physical development photothermographic element for a dry thermal silver-dye bleach process wherein the element comprises a silver halide complexing concentration of a silver halide complexing agent improvements are provided when the complexing agent is an organic ammonium chloride, bromide or iodide. After imagewise exposure of the element, a dye image can be produced by uniformly heating the element. Improvements are also produced by providing a dry activator element for producing a dye image in a separate photographic element by means of a dry physical development thermal dye-bleach process, wherein the activator element comprises a support having thereon a layer comprising a synthetic hydrophobic polymeric binder, a silver halide complexing concentration of a silver halide complexing agent, as described, a bleachable dye and a thermal solvent.
    Type: Grant
    Filed: January 25, 1979
    Date of Patent: November 25, 1980
    Assignee: Eastman Kodak Company
    Inventors: Carl F. Kohrt, Roland G. Willis
  • Patent number: 4187108
    Abstract: In a heat developable photographic material and process for providing a dye enhanced silver image, an element comprising a support having thereon in reactive association: (A) at least one heat developable photographic layer comprising (i) photosensitive silver halide, (ii) at least one active silver halide developing agent, (iii) an activating concentration of a development activator precursor, and (iv) a polymeric binder and (B) at least one layer comprising an azoaniline dye that is bleached in the non-image areas of the described element upon development of a latent image in the layer (A) by uniformly heating, can provide an improved image. After imagewise exposure of the described heat developable material, a dye enhanced silver image can be provided by heating the element containing the described combination of layers and materials.
    Type: Grant
    Filed: June 5, 1978
    Date of Patent: February 5, 1980
    Assignee: Eastman Kodak Company
    Inventor: Roland G. Willis