Patents by Inventor Stephen Craig Fields

Stephen Craig Fields 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).

  • Chlorination of carbohydrates and carbohydrate derivatives
    Patent number: 8691797
    Abstract: Disclosed is a method for chlorinating a carbohydrate or a derivative thereof to produce a polychlorinated carbohydrate or a derivative thereof, such as sucralose, the method involves (i) reacting the carbohydrate or derivative thereof with a chlorinating agent to obtain a reaction mixture comprising said polychlorinated carbohydrate or derivative thereof and at least one under-chlorinated carbohydrate or derivative thereof, (ii) returning the at least one under-chlorinated carbohydrate or derivative thereof to a chlorinating step and further chlorinating the at least one under-chlorinated carbohydrate or derivative thereof to obtain the desired polychlorinated carbohydrate or derivative thereof; and (iii) optionally repeating steps (i) and (ii) “n” times where n?1. The polychlorinated carbohydrate or a derivative thereof is obtained in high yields.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: April 8, 2014
    Assignee: Lexington Pharmaceuticals Laboratories, LLC
    Inventors: William Randal Erickson, Stephen Craig Fields
  • 6-alkyl or alkenyl-4-aminopicolinates and their use as herbicides
    Patent number: 7432227
    Abstract: 4-Aminopicolinic acids having alkyl or alkenyl substituents in the 6-position and their amine and acid derivatives are potent herbicides demonstrating a broad spectrum of weed control.
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: October 7, 2008
    Assignee: Dow AgroSciences LLC
    Inventors: Terry William Balko, Ann Marie Buysse, Stephen Craig Fields, Nicholas Martin Irvine, William Chi-Leung Lo, Christian Thomas Lowe, John Sanders Richburg, Paul Richard Schmitzer
  • Methylidene mevalonates and their use as herbicides
    Patent number: 7393812
    Abstract: Methylidene mevalonic acid, a material isolated from a fungal extract, and its primary alcohol and carboxylic acid derivatives, are potent herbicides demonstrating a broad spectrum of weed control. These materials are useful for weed control and for the cultivation of organically grown crops.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: July 1, 2008
    Assignee: Dow AgroSciences LLC
    Inventors: Ben Clifford Gerwick, III, Paul Richard Graupner, Stephen Craig Fields, Paul Richard Schmitzer, William Kirkland Brewster
  • 6-(1,1-difluoroalkyl)-4-aminopicolinates and their use as herbicides
    Patent number: 7291580
    Abstract: 4-Aminopicolinic acids having (1,1-difluoroalkyl) substituents in the 6-position and their amine and acid derivatives are potent herbicides demonstrating a broad spectrum of weed control.
    Type: Grant
    Filed: August 4, 2004
    Date of Patent: November 6, 2007
    Assignee: Dow AgroSciences LLC
    Inventors: Terry William Balko, Stephen Craig Fields, Nicholas Martin Irvine, Christian Thomas Lowe, Paul Richard Schmitzer
  • 6-Alkyl or alkenyl-4-aminopicolinates and their use as herbicides
    Publication number: 20040198608
    Abstract: 4-Aminopicolinic acids having alkyl or alkenyl substituents in the 6-position and their amine and acid derivatives are potent herbicides demonstrating a broad spectrum of weed control.
    Type: Application
    Filed: April 2, 2004
    Publication date: October 7, 2004
    Inventors: Terry William Balko, Ann Marie Buysse, Stephen Craig Fields, Nicholas Martin Irvine, William Chi-Leung Lo, Christian Thomas Lowe, John Sanders Richburg, Paul Richard Schmitzer
  • 6-aryl-4-aminopicolinates and their use as herbicides
    Patent number: 6784137
    Abstract: 4-Aminopicolinic acids having aryl or heteroaryl substituents in the 6-position and their amine and acid derivatives are potent herbicides demonstrating a broad spectrum of weed control.
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: August 31, 2004
    Assignee: Dow AgroSciences LLC
    Inventors: Terry William Balko, Ann Marie Buysse, Jeffrey Brian Epp, Stephen Craig Fields, Christian Thomas Lowe, Renee Joan Keese, John Sanders Richburg, III, James Melvin Ruiz, Monte Ray Weimer, Renard Antonio Green, Roger Eugene Gast, Kristy Bryan, Nicholas Martin Irvine, William Chi-Leung Lo, William Kirkland Brewster, Jeffery Dale Webster
  • 6-Aryl-4-aminopicolinates and their use as herbicides
    Publication number: 20030114311
    Abstract: 4-Aminopicolinic acids having aryl or heteroaryl substituents in the 6-position and their amine and acid derivatives are potent herbicides demonstrating a broad spectrum of weed control.
    Type: Application
    Filed: July 30, 2002
    Publication date: June 19, 2003
    Inventors: Terry William Balko, Ann Marie Buysse, Jeffrey Brian Epp, Stephen Craig Fields, Christian Thomas Lowe, Renee Joan Keese, John Sanders Richburg, James Melvin Ruiz, Monte Ray Weimer, Renard Antonio Green, Roger Eugene Gast, Kristy Bryan
  • 4-aminopicolinates and their use as herbicides
    Publication number: 20010047099
    Abstract: 4-Aminopicolinic acids, having halogen, alkoxy, alkylthio, aryloxy, heteroaryloxy or trifluoromethyl substituents in the 3-, 5- and 6-positions, and their amine and acid derivatives are potent herbicides demonstrating a broad spectrum of weed control.
    Type: Application
    Filed: January 12, 2001
    Publication date: November 29, 2001
    Inventors: Stephen Craig Fields, Anita Lenora Alexander, Terry William Balko, Leslie Anne Bjelk, Ann Marie Buysse, Renee Joan Keese, Karl Leopold Krumel, William Chi-Leung Lo, Christian Thomas Lowe, John Sanders Richburg, James Melvin Ruiz
  • 4-aminopicolinates and their use as herbicides
    Patent number: 6297197
    Abstract: 4-Aminopicolinic acids, having halogen, alkoxy, alkylthio, aryloxy, heteroaryloxy or trifluoromethyl substituents in the 3-, 5- and 6-positions, and their amine and acid derivatives are potent herbicides demonstrating a broad spectrum of weed control.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: October 2, 2001
    Assignee: Dow AgroSciences LLC
    Inventors: Stephen Craig Fields, Anita Lenora Alexander, Terry William Balko, Leslie Anne Bjelk, Ann Marie Buysse, Renee Joan Keese, Karl Leopold Krumel, William Chi-Leung Lo, Christian Thomas Lowe, John Sanders Richburg, III, James Melvin Ruiz