Patents by Inventor Ronald W. Kobler

Ronald W. Kobler 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).

  • Polyvinyl chloride-polyethylene terephthalate separation product
    Patent number: 5399433
    Abstract: A hydrophobic polyvinyl chloride chip composition is described which has a preferred affinity for air when in water. The chip is supernatant in water after contact with air and has a skin layer containing a surface conditioning agent.A method for separating a PET/PVC chip admixture is also disclosed. The chip admixture is contacted with a surface conditioning agent to produce relatively hydrophobic polyvinyl chloride chips which can be floated in an aerated aqueous medium. The polyethylene terephthalate chips are recovered from the bottom of the aqueous medium. The flotation can be conducted in pure water without frothing or densifying agents.
    Type: Grant
    Filed: August 9, 1993
    Date of Patent: March 21, 1995
    Assignee: Recovery Processes International, Inc.
    Inventor: Ronald W. Kobler
  • Polyvinyl chloride-polyethylene terephthalate separation process and product
    Patent number: 5234110
    Abstract: A hydrophobic polyvinyl chloride chip composition is described which has a preferred affinity for air when in water. The chip is supernatant in water after contact with air and has a skin layer containing a surface conditioning agent.A method for separating a PET/PVC chip admixture is also disclosed. The chip admixture is contacted with a surface conditioning agent to produce relatively hydrophobic polyvinyl chloride chips which can be floated in an aerated aqueous medium. The polyethylene terephthalate chips are recovered from the bottom of the aqueous medium. The flotation can be conducted in pure water without frothing or densifying agents.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: August 10, 1993
    Inventor: Ronald W. Kobler