Patents by Inventor Robert R. Massey

Robert R. Massey 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).

  • Initially erasable ball pen ink
    Patent number: 4738725
    Abstract: A ball pen ink of transiently erasable type to be dispensed from a pressurized ball pen incorporates an elastommeric polymer, pigment and a mixed solvent system. The mixed solvent system includes a volatile solvent component, a non-volatile solvent component and a non-volatile solvent/plasticizer component in such relative amounts and with relation to the elastomer and pigment combination as achieves a balance between ink viscosity and thixotropy to provide good writing qualities.
    Type: Grant
    Filed: April 21, 1987
    Date of Patent: April 19, 1988
    Assignee: Scripto-Tokai, Inc.
    Inventors: Phillip M. Daugherty, Robert R. Massey