Patents by Inventor Tung Y. Weng

Tung Y. Weng 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).

  • Tamper-evident pressure sensitive facestock labels
    Patent number: 5405692
    Abstract: A film useful in tamper-evident pressure sensitive label applications comprises a blend of incompatible polymers wherein the film is melt extrusion cast and has a cohesive strength less than the adhesive strength of an adhesive material bonded to one surface of the film. The adhesive material has an adhesive strength greater than the cohesive strength of the film so that when the tamper-evident pressure sensitive label has been adhered to a substrate attempted tampering or removal of the label causes at least partial destruction of the film.
    Type: Grant
    Filed: January 7, 1994
    Date of Patent: April 11, 1995
    Assignee: Tredegar Industries, Inc.
    Inventors: Tung Y. Weng, Carl D. Ray
  • Tamper-evident pressure sensitive facestock labels
    Patent number: 5277971
    Abstract: A film useful in tamper-evident pressure sensitive label applications comprises a blend of incompatible polymers wherein the film is melt extrusion cast and has a cohesive strength less than the adhesive strength of an adhesive material bonded to one surface of the film. The adhesive material has an adhesive strength greater than the cohesive strength of the film so that when the tamper-evident pressure sensitive label has been adhered to a substrate attempted tampering or removal of the label causes at least partial destruction of the film.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: January 11, 1994
    Assignee: Tredegar Industries, Inc.
    Inventors: Tung Y. Weng, Carl D. Ray