Patents by Inventor Roy H. Donnell

Roy H. Donnell 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).

  • Valve bag and method for making a valve bag
    Patent number: 6164823
    Abstract: A valve bag has a sleeve that includes a butt seam formed by abutting opposed edges of a paper sheet and securing the abutting edges. A strip of tape may be used to secure the abutting edges. The interior surface of the sleeve and the tape are both constructed from a sealable material. A tight seal is achieved when the sleeve is sealed.
    Type: Grant
    Filed: December 7, 1998
    Date of Patent: December 26, 2000
    Assignee: Southern Bag Corporation, Ltd.
    Inventor: Roy H. Donnell