Patents by Inventor Robert Schenfele

Robert Schenfele 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).

  • Solventless process for decontamination of polyacetylene
    Patent number: 4795835
    Abstract: The process relates to the removal of copper contaminants from crude polyacetylenes containing up to 30 wt. % copper impurity by contacting a melt of the polyacetylene with aqueous hydrogen chloride to form an oil phase and an aqueous acid phase, separating said phases, treating the separated oil phase with from about 1 to about 10 volumes of water until subsequent oil and water phases are formed, agitating the separated oil phase while cooling to form a particulate product and drying said particles to recover purified polyacetylene.
    Type: Grant
    Filed: March 3, 1988
    Date of Patent: January 3, 1989
    Assignee: GAF Corporation
    Inventor: Robert Schenfele