Patents by Inventor Leo Weitzman

Leo Weitzman 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: 5200033
    Abstract: A method and device for removing organic compounds from soil, solids, sludges and other types of contaminated materials utilizing a non-rotating contactor which can be tightly sealed from air infiltration. Binders such as cement, lime, flyash or kiln dust may be added to the soil prior to treatment so as to aid in the volatilization of the volatile organics and to immobilize the non-volatile constituents in the treated solids. The contaminated materials are fed to a chamber with a movable rake therein and are subjected to temperatures sufficiently high to violatize the organic constituents. The volatilized contaminants are purged with small amounts of air or other non-condensible gas and with superheated steam. The organic constituents can be captured in a vapor phase or they can be condensed and captured in the condensed liquid.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: April 6, 1993
    Assignee: LWV Associates, Inc.
    Inventor: Leo Weitzman
  • Patent number: 4662948
    Abstract: A method is provided for removing PCBs and/or dioxins from solids contaminated therewith comprising contacting such solids with a halogenated hydrocarbon and a polar solvent.
    Type: Grant
    Filed: November 28, 1984
    Date of Patent: May 5, 1987
    Assignee: Electric Power Research Institute
    Inventor: Leo Weitzman