Patents by Inventor Stephen C. Slahck

Stephen C. Slahck 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
  • Effects of bactericide (peracetic acid-hydrogen peroxide-water combination) to agricultural chemicals in bacteria control when they are in contact with one another
    Patent number: 6716457
    Abstract: The present invention relates to a process for inhibiting or eliminating the growth of microorganisms in pesticide suspensions. More particularly, the process of the present invention includes the addition of a combination of peracetic acid, hydrogen peroxide, and water to the pesticide suspension. Further, the process of the present invention includes the application of the peracetic acid, hydrogen peroxide, and water combination to the interior surface of the vessel in which the pesticide suspension is contained. Still further, the process of the present invention includes the application of the peracetic acid, hydrogen peroxide, and water combination to a surface in which the pesticide suspension is in contact.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: April 6, 2004
    Assignee: Bayer Polymers LLC
    Inventors: Karen L. Eagles, Donald W. Edson, Kevin Park, John G. Rogers, John W. Brandriff, Stephen C. Slahck
  • Process for producing dimethyl (2,2,2-trichloro-1-hydroxyethyl)-phosphonate and granular formulations thereof
    Patent number: 5922404
    Abstract: The present invention relates to an integrated process for synthesizing dimethyl (2,2,2-trichloro-1-hydroxyethyl)-phosphonate and a process for impregnating the dimethyl (2,2,2-trichloro-1-hydroxyethyl)-phosphonate on to inert carrier granules. The process involves adding dimethyl phosphite to a reaction mixture containing chloral under anhydrous, inert conditions. The molar ratio of chloral to dimethyl phosphite used in the reaction mixture is from about 1.0:1.0 to about 1.1:1.0. The impregnation process involves transferring molten dimethyl (2,2,2-trichloro-1-hydroxyethyl)-phosphonate into a process vessel and discharging weighed aliquots into a formulation vessel to form a granular product containing dimethyl (2,2,2-trichloro-1-hydroxyethyl)-phosphonate.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: July 13, 1999
    Assignee: Bayer Corporation
    Inventors: Vidyanatha A. Prasad, Klaus Jelich, Christopher M. Tusa, Daniel E. Terry, Stephen C. Slahck, Scott P. Hensley