Patents by Inventor David R. Koller

David R. Koller 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).

  • Manufacturing method for thermoplastic container with integral lifting ring
    Patent number: 4713207
    Abstract: A plastic container with an integral handling ring is formed in a mold having a pair of side sections movable toward each other and a pair of co-planar end sections movable toward each other and toward said side sections, by placing molten extrudate in a mold between the side and end sections, so that a handling ring can be formed and compression joined to the container at the same time the container is being formed by blow-molding.
    Type: Grant
    Filed: July 7, 1986
    Date of Patent: December 15, 1987
    Assignee: Container Corporation of America
    Inventors: Theodore H. Udell, David R. Koller