Patents by Inventor Reid A. Conroy

Reid A. Conroy 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).

  • Time color indicator
    Patent number: 4212153
    Abstract: A laminated indicator which changes in a visually perceptible mode with the passage of time and a method for making such an indicator. At least two layers are provided whereby the molecular migration of an agent in an interior layer to the outermost surface of the exterior layer causes a change which can be visually percepted, e.g., a change in color or shade. Preferred embodiments include the migration of a dye or the migration of an acid or base wherein the outermost layer has the other member of an acid-base pair and a pH indicator.
    Type: Grant
    Filed: February 7, 1978
    Date of Patent: July 15, 1980
    Assignee: Herculite Protective Fabrics Corporation
    Inventors: Agis F. Kydonieus, Inja K. Smith, Reid A. Conroy, Ernest A. Pedicano