Patents by Inventor Seymour Schuman

Seymour Schuman 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).

  • Steam sterilization indicator
    Patent number: RE36062
    Abstract: A steam sterilization indicator for indicating both exposure to steam and sterilization is provided. The steam sterilization indicator includes a backing member. A tablet formed of a compound having a first melting point and second melting point which is lower that the first melting point, the second melting point being the melting point of the compound exposed to steam is also provided. A wick is affixed to the backing member adjacent to the tablet. A steam permeable material covers the tablet and the wick. Upon melting, the tablet material is absorbed by the wick. A handle is affixed to the backing member. One end of the handle includes a steam exposure indicator formed of a color changing ink which changes color in the presence of steam.
    Type: Grant
    Filed: October 19, 1994
    Date of Patent: January 26, 1999
    Assignee: Propper Manufacturing Co., Inc.
    Inventors: Irving A. Speelman, Frank E. Platko, Kenneth A. Summer, Seymour Schuman