Patents by Inventor Fred S. Lieberman

Fred S. Lieberman 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).

  • Disposable, biodegradable air freshening device and food preservative
    Patent number: 5591504
    Abstract: A disposable, biodegradable material for use as an air freshener in a closed container and/or for use in containers containing perishable food products which includes an elongated sheet having an upper face and a lower face which is composed of a cellulosic material present as a plurality of randomly intermeshed fibers. The elongated sheet contains a hygroscopic absorptive material attached thereto.
    Type: Grant
    Filed: May 2, 1995
    Date of Patent: January 7, 1997
    Assignee: DJM No. 7, Inc.
    Inventor: Fred S. Lieberman