Patents by Inventor Keith A. Heffner

Keith A. Heffner 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).

  • Customized arrangement for presorting recyclable materials
    Patent number: 5246119
    Abstract: An arrangement for presorting recyclable materials includes a first sector-shaped plastic bag having a first opening, a second sector-shaped plastic bag having a second opening, and a third sector-shaped plastic bag having a third opening. A first connector connects the first sector-shaped plastic bag to the second sector-shaped plastic bag near the first and second openings such that the second sector-shaped plastic bag can be disconnected from the first sector-shaped plastic bag to allow connection of a fourth sector-shaped plastic bag (that is identical to the second sector-shaped plastic bag) to the first sector-shaped plastic bag without having to remove the first sector-shaped plastic bag.
    Type: Grant
    Filed: December 4, 1991
    Date of Patent: September 21, 1993
    Inventor: Keith A. Heffner