Patents by Inventor Alvin Levenberg

Alvin Levenberg 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: 4449631
    Abstract: A sealable package for pharmaceutical and other products which will immediately reveal the presence of tampering. The package consists of a sealed envelope of thermoplastic film having a printed outline in which the sealing of the package is performed at the printed outline. After sealing, the film is shrunk tending to inflate the sealed area because of entrapped air. Should the package be ruptured the inflation is lost. Should the package be cut at the sealed area, it is impossible to reseal the package without a visual indication caused by irregularities in the printed area.
    Type: Grant
    Filed: March 7, 1983
    Date of Patent: May 22, 1984
    Inventors: Nat Levenberg, Alvin Levenberg