Patents by Inventor Robert C. Hydell

Robert C. Hydell 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: 4296947
    Abstract: A process is provided for producing a pressure-sensitive carbonless transfer sheet comprising preparing a solution of a first chromogenic material, the solution of the first chromogenic material including at least one chromogenic compound dissolved in a carrier oil, and the first chromogenic material being reactive with a second chromogenic material in the presence of the carrier oil to form a color. The solution of the first chromogenic material is mixed with a liquid radiation curable substance to form a coating composition, the liquid radiation curable substance being curable to a frangible resin and compatible with the color-forming capabilities of said first chromogenic material. A film forming material is applied to a substrate, the film forming material being settable to form a barrier layer which substantially prevents penetration of the substrate by the coating composition upon application of the coating composition to the substrate.
    Type: Grant
    Filed: February 2, 1979
    Date of Patent: October 27, 1981
    Assignee: The Mead Corporation
    Inventors: Sydney M. Spatz, Robert C. Hydell, Gerald T. Davis
  • Patent number: 4186115
    Abstract: A novel chromogenic composition is produced comprising at least one color precursor dissolved in a carrier oil, the carrier oil being a weakly polar solvent having a boiling point of from about 180.degree. C. to about 300.degree. C., the color precursor being of the electron donor type and being reactive with color developers of the electron acceptor type to form an image and a liquid radiation curable substance, the liquid radiation curable substance being selected from the group consisting of isocyanate modified acrylic, methacrylic and itaconic acid esters of polyhydric alcohols, acrylic prepolymers derived from partial esterification of pentaerythritol with acrylic acid and acrylic acid esters and mixtures thereof, the liquid radiation curable substance being curable to a frangible resin upon exposure to radiation. The coating composition has a viscosity in the range of about 1000 cps. to about 3500 cps.
    Type: Grant
    Filed: June 14, 1978
    Date of Patent: January 29, 1980
    Assignee: The Mead Corporation
    Inventors: Sydney M. Spatz, Robert C. Hydell, Gerald T. Davis
  • Patent number: 4138508
    Abstract: A process is provided for producing a pressure-sensitive carbonless transfer sheet comprising preparing a solution of a first chromogenic material, the solution of the first chromogenic material including at least one chromogenic compound dissolved in a carrier oil, and the first chromogenic material being reactive with a second chromogenic material in the presence of the carrier oil to form a color. The solution of the first chromogenic material is mixed with a liquid radiation curable substance to form a coating composition, the liquid radiation curable substance being curable to a frangible resin and compatible with the color-forming capabilities of said first chromogenic material. A film forming material is applied to a substrate, the film forming material being settable to form a barrier layer which substantially prevents penetration of the substrate by the coating composition upon application of the coating composition to the substrate.
    Type: Grant
    Filed: June 17, 1976
    Date of Patent: February 6, 1979
    Assignee: The Mead Corporation
    Inventors: Sydney M. Spatz, Robert C. Hydell, Gerald T. Davis