Patents by Inventor George Levitt

George Levitt 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).

  • Herbicidal sulfonamides
    Patent number: 5017214
    Abstract: Tetrazole-substituted benzenesulfonamides are useful as agricultural chemicals and, in particular, as growth regulants and herbicides.
    Type: Grant
    Filed: November 15, 1989
    Date of Patent: May 21, 1991
    Inventor: George Levitt
  • Herbicidal sulfonamides
    Patent number: 4913726
    Abstract: Tetrazole-substituted benzenesulfonamides are useful as agricultural chemicals and, in particular, as growth regulants and herbicides.
    Type: Grant
    Filed: August 31, 1988
    Date of Patent: April 3, 1990
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: George Levitt
  • Agricultural sulfonamides
    Patent number: 4892946
    Abstract: N-(heterocyclicaminocarbonyl)arylsulfonamides in which the aryl radical is substituted in the 2-position by a carboxy radical, ester, thioester, or amide thereof; e.g. N-[(4,6-dimethylpyrimidin-2-yl)aminocarbonyl]-2-methoxycarbonylbenzenesulf onamide or N-[(4,6-dimethoxy-1,3,5-triazin-2-yl)aminocarbonyl]-2-methoxycarbonylbenze nesulfonamide; are useful for the regulation of plant growth and as pre-emergence and post-emergence herbicides.
    Type: Grant
    Filed: November 24, 1980
    Date of Patent: January 9, 1990
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: George Levitt
  • Thiophenesulfonamide herbicides
    Patent number: 4877440
    Abstract: Thiophenesulfonamides of the formula ##STR1## are useful as herbicides.
    Type: Grant
    Filed: February 18, 1988
    Date of Patent: October 31, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Joel R. Christensen, John Cuomo, George Levitt
  • Herbicidal acetals and ketals
    Patent number: 4861366
    Abstract: Novel furan- and thiophenesulfonamides such as 3-(1,3-dioxolan-2-yl)-N-[(4-methoxy-6-methyl-1,3-5-triazin-2-yl)aminocarbo nyl]-2-thiophenesulfonamide and N-[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl]-3-(1, 3-dioxolan-2-yl)-2-thiophenesulfonamide are highly active pre-emergent and/or post-emergent herbicides.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Agricultural sulfonamides
    Patent number: 4830662
    Abstract: N-(heterocyclicaminocarbonyl)arylsulfonamides in which the aryl radical is substituted in the 2-position by a carboxy radical, ester, thioester, or amide thereof; e.g. N-[(4,6-dimethylpyrimidin-2-yl)aminocarbonyl]-2-methoxycarbonylbenzenesulf onamide or N-[(4,6-dimethoxy-1,3,5-triazin-2-yl)aminocarbonyl]-2-methoxycarbonylbenze nesulfonamide; are useful for the regulation of plant growth and as pre-emergence and post-emergence herbicides.
    Type: Grant
    Filed: March 27, 1986
    Date of Patent: May 16, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Agricultural sulfonamides
    Patent number: 4818278
    Abstract: N-(heterocyclicaminocarbonyl)arylsulfonamides in which the aryl radical is substituted in the 2-position by a carboxy radical, ester, thioester, or amide thereof; e.g. N-[(4,6-dimethylpyrimidin-2-yl)-aminocarbonyl]-2-methoxycarbonylbenzenesul fonamide or N-[(4,6-dimethoxy-1,3,5-triazin-2-yl)aminocarbonyl]-2-methoxycarbonylbenze nesulfonamide; are useful for the regulation of plant growth and as pre-emergence and post-emergence herbicides.
    Type: Grant
    Filed: September 14, 1984
    Date of Patent: April 4, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Herbicidal sulfonamides
    Patent number: 4786311
    Abstract: Tetrazole-substituted benzenesulfonamides are useful as agricultural chemicals and, in particular, as growth regulants and herbicides.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: November 22, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Agricultural pyridinesulfonamides
    Patent number: 4776878
    Abstract: N-(heterocyclicaminocarbonyl)pyridinesulfonamides; are useful for the regulation of plant growth and as pre-emergence and post-emergence herbicides.
    Type: Grant
    Filed: July 16, 1985
    Date of Patent: October 11, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Agricultural sulfonamides
    Patent number: 4755216
    Abstract: N-(heterocyclicaminocarbonyl)arylsulfonamides in which aryl radical is substituted in the 2-position by a carboxy radical, ester, thioester, or amide thereof; e.g. N-[(4,6-dimethylpyrimidin-2-yl)-aminocarbonyl]-2-methoxycarbonylbenzenesul fonamide or N-[(4,6-dimethoxy-1,3,5-triazin-2-yl)aminocarbonyl]-2-methoxycarbonylbenze nesulfonamide; are useful for the regulation of plant growth and as pre-emergence and post-emergence herbicides.
    Type: Grant
    Filed: April 18, 1986
    Date of Patent: July 5, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Herbicidal acetals and ketals
    Patent number: 4753672
    Abstract: Novel furan- and thiophenesulfonamides such as 3-(1,3-dioxolan-2-yl)-N-[(4-methoxy-6-methyl-1,3-5-triazin-2-yl)aminocarbo nyl]-2-thiophenesulfonamide and N-[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl]-3-(1,3-dioxolan-2-yl)-2-thi ophenesulfonamide are highly active pre-emergent and/or post-emergent herbicides.
    Type: Grant
    Filed: January 23, 1987
    Date of Patent: June 28, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Herbicidal sulfonamides
    Patent number: 4746353
    Abstract: Tetrazole-substituted benzenesulfonamides are useful as agricultural chemicals and, in particular, as growth regulants and herbicides.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: May 24, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Thiophenesulfonamide herbicides
    Patent number: 4743290
    Abstract: Thiophenesulfonamides of the formula ##STR1## are useful as herbicides.
    Type: Grant
    Filed: November 26, 1986
    Date of Patent: May 10, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Joel R. Christensen, John Cuomo, George Levitt
  • Thiophenesulfonamides
    Patent number: 4741757
    Abstract: Thiophenesulfonamides useful as herbicides and plant growth regulants, herbicidal compositions containing thiophenesulfonamides, and methods of applying the compositions to areas containing undesired vegetation are described.
    Type: Grant
    Filed: March 11, 1987
    Date of Patent: May 3, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Herbicidal 2,6-disubstituted benzylsulfonamides and benzebesulfamates
    Patent number: 4737185
    Abstract: This invention relates to novel disubstituted benzylsulfonamides and benzenesulfamates, agriculturally suitable compositions thereof and a method of their use as preemergent or postemergent herbicides or plant growth regulants.
    Type: Grant
    Filed: April 13, 1987
    Date of Patent: April 12, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: James V. Hay, George Levitt
  • Agricultural sulfonamides
    Patent number: 4721520
    Abstract: N-(heterocyclicaminocarbonyl)arylsulfonamides in which the aryl radical is substituted in the 2-position by a carboxy radical, ester, thioester, or amide thereof; e.g. N-[(4,6-dimethylpyrimidin-2-yl)aminocarbonyl]-2-methoxycarbonylbenzenesulf onamide or N-[(4,6-dimethoxy-1,3,5-triazin-2-yl)aminocarbonyl]-2-methoxycarbonylbenze nesulfonamide; are useful for the regulation of plant growth and as pre-emergence and post-emergence herbicides.
    Type: Grant
    Filed: March 27, 1986
    Date of Patent: January 26, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Agricultural ureas and isoureas
    Patent number: 4701535
    Abstract: This invention relates to ureas and isoureas which are useful as herbicides and plant growth regulants. In particular, compounds of the instant invention have demonstrated great selectivity.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: October 20, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Agricultural sulfonamides
    Patent number: 4689072
    Abstract: N-(heterocyclicaminocarbonyl)arylsulfonamides in which the aryl radical is substiuted in the 2-position by a carboxy radical, ester, thioester, or amide thereof; e.g. N-[(4,6-dimethylpyrimidin-2-yl)aminocarbonyl]-2-methoxycarbonylbenzenesulf onamide or N-[(4,6-dimethoxy-1,3,5-triazin-2-yl)aminocarbonyl]-2-methoxycarbonylbenze nesulfonamide; are useful for the regulation of plant growth and as pre-emergence and post-emergence herbicides.
    Type: Grant
    Filed: July 30, 1986
    Date of Patent: August 25, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Herbicidal sulfonamides
    Patent number: H386
    Abstract: This invention relates to sulfonylureas, agriculturally suitable compositions containing them and their method-of-use as preemergent and/or postemergent herbicides or plant growth regulants.
    Type: Grant
    Filed: August 27, 1985
    Date of Patent: December 1, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Process for the preparation of alkyl 3-chlorosulfonylthiophene-2-carboxylate
    Patent number: H504
    Abstract: A process for preparation of chlorosulfonyl thiophene compounds comprising contacting a thiophenamine with sodium or potassium nitrite to produce a diazonium salt, then contacting said salt with sulfur dioxide and cuprous or cupric chloride, or bromide. Addition of gaseous HCl, concentrated H.sub.2 SO.sub.4, or oleum to the diazotization mixture enhances yield.
    Type: Grant
    Filed: March 7, 1985
    Date of Patent: August 2, 1988
    Assignee: E. I. Du Pont de Nemours
    Inventors: George Levitt, Richard V. Pater