Patents by Inventor Ronald D. Stefanski

Ronald D. 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).

  • Apparatus and process for the separation of solids and liquids
    Patent number: 8962906
    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: Grant
    Filed: September 20, 2010
    Date of Patent: February 24, 2015
    Assignee: BP Corporation North America Inc.
    Inventors: Richard A Wilsak, Scott A Roberts, Dean B. Comstock, Ronald D Stefanski
  • Apparatus and Process for the Separation of Solids and Liquids
    Publication number: 20110006008
    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: September 20, 2010
    Publication date: January 13, 2011
    Applicant: BP Corporation North America Inc.
    Inventors: Richard A Wilsak, Scott A. Roberts, Dean B. Comstock, Ronald D. Stefanski
  • Apparatus and process for the separation of solids and liquids
    Patent number: 7812206
    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: Grant
    Filed: March 21, 2006
    Date of Patent: October 12, 2010
    Assignee: BP Corporation North America Inc.
    Inventors: Richard A. Wilsak, Scott A. Roberts, Dean B. Comstock, Ronald D. Stefanski