Patents by Inventor Randall L. Barcus

Randall L. Barcus 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).

  • Removal of contaminants from materials
    Publication number: 20020023662
    Abstract: An improved approach for cleaning and recycling materials is based on pressurized solvents including liquid propane, butane, dimethyl ether, and supercritical carbon dioxide. The apporaches are particularly suitable for cleaning sorbent materials. The approach allows for recycling of the sorbent materials, the solvent and the contaminents, typically oils and the like.
    Type: Application
    Filed: September 7, 2001
    Publication date: February 28, 2002
    Applicant: CRI Recycling Service, Inc.
    Inventors: John W. Summerfield, John P. Markiewicz, John M. Moses, Randall L. Barcus
  • Removal of contaminants from materials
    Patent number: 6312528
    Abstract: An improved approach for cleaning and recycling materials is based on pressurized solvents including liquid propane, butane, dimethyl ether, and supercritical carbon dioxide. The approaches are particularly suitable for cleaning sorbent materials. The approach allows for recycling of the sorbent materials, the solvent and the contaminents, typically oils and the like.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: November 6, 2001
    Assignee: CRI Recycling Service, Inc.
    Inventors: John W. Summerfield, John P. Markiewicz, John M. Moses, Randall L. Barcus