Patents by Inventor W. John Rathbun

W. John Rathbun 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: 5609894
    Abstract: The present invention is a mold apparatus and method for injection molding a plastic part. A cavity mold part defines at least one main cavity. A core mold assembly has surfaces complementary with the main cavities. The core mold assembly includes an outer core mold part having a center opening. An outer ejector part is positioned for movement in the center opening. An inner stem ejector part is positioned within the outer ejector part. The cavity mold part and the core mold assembly are moved together and the thermoplastic material injected to form the plastic part. The cavity mold and the core mold assembly is separated. The outer and inner ejector parts are moved together and away from the outer core mold part. Preferably a stripper part rotates a portion of the formed part. The inner stem ejector part is then moved relative to the outer ejector part and completed plastic parts removed.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: March 11, 1997
    Assignee: Rathbun Family Real Estate Group
    Inventor: W. John Rathbun
  • Patent number: 5505331
    Abstract: A plastic recyclable container including a container body having a bottom and a continuous sidewall. A pair of ears are positioned on the sidewall and include opposed shaped openings. A plastic handle has a connector assembly at each end including a pair of inwardly directed projections received by the openings. The projections include holding members positioned within the ears. The cross-section of the projections is shaped complementary with the ear openings ensuring that the handle can be moved to different predetermined positions.
    Type: Grant
    Filed: May 17, 1994
    Date of Patent: April 9, 1996
    Assignee: Rathbun Family Real Estate Group
    Inventor: W. John Rathbun