Patents by Inventor E. Joseph Stilwell

E. Joseph Stilwell 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).

  • Multi-walled tamper-proof container and method for enhancing tamper evidence
    Patent number: 4755405
    Abstract: A tamper-resistant vessel which contains a liquid is provided with a non-adherent multi-walled construction having, in one embodiment, at least two adjacent non-adherent layers for providing a void in between to enable tamper indication by discoloration indicative of gross spoliage. In one embodiment, the container or vessel has an opaque inner wall and a closely spaced transparent outer wall, with a void in between. Puncture from the outside through the two walls provides seepage of the interiorly-carried liquid between the multiple walls to provide the look of spoilage.
    Type: Grant
    Filed: May 20, 1987
    Date of Patent: July 5, 1988
    Assignee: McNeilab Inc.
    Inventors: Arthur A. Massucco, E. Joseph Stilwell, George E. Pickering, Richard E. Merrill