Patents by Inventor Robert D. Ingalls

Robert D. Ingalls 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).

  • Method for preparing O,O-dialkyl S-[2-(alkylthio)alkyl] phosphorodithioates
    Patent number: 7049456
    Abstract: The invention relates to a method of preparing O,O-dialkyl S-[2-(alkylthio)alkyl] phosphorodithioates by treating O,O-dialkyl dithiophosphoric acids with a base in the substantial absence of organic solvent to obtain O,O-dialkyl dithiophosphoric acid salts that are in turn treated with thioalcohol derivatives to form the O,O-dialkyl S-[2-(alkylthio)alkyl] phosphorodithioates.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: May 23, 2006
    Assignee: Bayer Cropscience LP
    Inventors: Vidyanatha A. Prasad, Robert D. Ingalls, Stephen C. Slahck, Christopher M. Tusa
  • Method for preparing O,O-dialkyl S-[2-(alkylthio)alkyl] phosphorodithioates
    Publication number: 20040176629
    Abstract: The invention relates to a method of preparing O,O-dialkyl S-[2-(alkylthio)alkyl]phosphorodithioates by treating -O,O-dialkyl dithiophosphoric acids with a base in the substantial absence of organic solvent to obtain O,O-dialkyl dithiophosphoric acid salts that are in turn treated with thioalcohol derivatives to form the O,O-dialkyl S-[2-(alkylthio)alkyl]phosphorodithioates.
    Type: Application
    Filed: March 7, 2003
    Publication date: September 9, 2004
    Inventors: Vidyanatha A. Prasad, Robert D. Ingalls, Stephen C. Slahck, Christopher M. Tusa
  • Methods for purifying O,O-dialkyl S-[2-(alkylthio)alkyl] phosphorodithioates
    Publication number: 20040167348
    Abstract: The invention relates to a method of purifying an O,O-dialkyl S-[2-(alkylthio)alkyl] phosphorodithioate by purging a sample containing a volatile and the O,O-dialkyl S-[2-(alkylthio)alkyl] phosphorodithioate with a gas.
    Type: Application
    Filed: February 26, 2003
    Publication date: August 26, 2004
    Inventors: Vidyanatha A. Prasad, Robert D. Ingalls, Stephen C. Slahck, Christopher M. Tusa, Paul E. Nagy, Michael P. Newcomer, Donald K. Smith