Patents by Inventor Martin S. Rifkin

Martin S. Rifkin 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).

  • Personal drinking water purification tube
    Patent number: 5045195
    Abstract: A portable personal water filtration and purification device which includes an elongate tubular filter housing with layers of mechanical filtration and contains a layer of granular activated charcoal impregnated with silver located between the layers of mechanical filter medium. A mouthpiece limits the rate of flow of water through the filter unit, while making it convenient to draw water through the filter. In one embodiment, a filter unit is attached to a flexible drinking tube and the filter unit is located within a portable water container conveniently carried by a person.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: September 3, 1991
    Assignee: Accuventure, Inc.
    Inventors: Bruce D. Spangrud, Martin S. Rifkin