Patents by Inventor William R. Leyendecker

William R. Leyendecker 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).

  • Recovery of zerovalent nickel complexes
    Patent number: 4539302
    Abstract: Process for recovery of zerovalent nickel organophosphorus containing catalyst from a hydrocyanation product stream by controlling the level of unreacted mononitriles in the stream causing the thus treated stream to form two phases and recovering catalyst from the heavier phase.
    Type: Grant
    Filed: April 30, 1984
    Date of Patent: September 3, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: William R. Leyendecker, Morris Rapoport