Patents by Inventor Patrick L. Severin

Patrick L. Severin 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).

  • Method for melting contaminated snow and washing solids held therein
    Patent number: 5266220
    Abstract: A method for melting snow containing solids and chemical contaminants and washing the solids is disclosed therein. The method includes the steps of heating the snow mixture within a hopper to melt the snow into water, gravitationally separating the solids from the water, agitating the water and solids to wash and separate chemical contaminates from the solids, discharging the water/contaminant mixture from the hopper for further treatment, and discharging the decontaminated solids. A cleansing agent may be added during the washing step to facilitate separation of the chemical contaminants from the solids.
    Type: Grant
    Filed: October 16, 1991
    Date of Patent: November 30, 1993
    Assignee: Patrick E. Hammond
    Inventors: Patrick E. Hammond, Patrick L. Severin, William C. Drake