Patents by Inventor Ronald Stefanski

Ronald Stefanski 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).

  • Solid-liquid separation process
    Patent number: 8211319
    Abstract: A process for separating solids from liquids in a filtration zone defined by a higher concentration zone and a lower concentration zone separated by a filter. The process includes the steps of directing a slurry feed comprising a liquid and solids into the higher concentration zone, directing a displacement fluid to the higher concentration zone and passing at least a portion of the liquid through a filter to the filtrate zone, producing a filtrate.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: July 3, 2012
    Assignee: BP Corporation North America Inc.
    Inventors: Richard A. Wilsak, Scott A. Roberts, Dean B. Comstock, Ronald Stefanski, George A. Huff
  • Apparatus and Process for the Separation of Solids and Liquids
    Publication number: 20070225539
    Abstract: A filter column apparatus comprising a filtration zone and a reslurry zone. These zones are separated by a barrier wall or are in substantial cooperation with each other. Also disclosed is a process for separating at least a portion of at least one substantially solid component from a solid-liquid stream comprising the substantially solid component and at least one substantially liquid component. Also disclosed is a process for forming a substantially solids containing packed bed. Also disclosed is a process for purifying paraxylene in a filtration zone.
    Type: Application
    Filed: March 21, 2006
    Publication date: September 27, 2007
    Inventors: Richard Wilsak, Scott Roberts, Dean Comstock, Ronald Stefanski
  • Solid-liquid separation process
    Publication number: 20050056599
    Abstract: A process for separating solids from liquids in a filtration zone defined by a higher concentration zone and a lower concentration zone separated by a filter. The process includes the steps of directing a slurry feed comprising a liquid and solids into the higher concentration zone, directing a displacement fluid to the higher concentration zone and passing at least a portion of the liquid through a filter to the filtrate zone, producing a filtrate.
    Type: Application
    Filed: September 16, 2003
    Publication date: March 17, 2005
    Inventors: Richard Wilsak, Scott Roberts, Dean Comstock, Ronald Stefanski, George Huff