Patents by Inventor Ivy Wolpin

Ivy Wolpin 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).

  • Hold-open bag top
    Patent number: 5044774
    Abstract: A thermoplastic bag having a flexible top has a stiff strip around the mouth of the bag which when rolled outward bends to hold open the bag.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: September 3, 1991
    Assignee: Mobil Oil Corporation
    Inventors: Edward M. Bullard, Stephen K. Guerrera, Fox J. Herrington, Ivy Wolpin