Patents by Inventor William A. Kleschick

William A. Kleschick 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).

  • Substituted 1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonyl chlorides
    Patent number: 4886883
    Abstract: Novel substituted triazolo[1,5-a]pyrimidine-2-sulfonamides, e.g., 5,7-dimethyl-N-(2,6-dichlorophenyl)-1,2,4-triazolo[1,5-a]pyrimidine-2-sulf onamide and their agriculturally acceptable salt are prepared. These compounds and compositions containing them are useful for the control of unwanted vegetation. Novel substituted triazolo[1,5-a]pyrimidine-2-sulfonyl chlorides and substituted anilines and their use as intermediates are also described.
    Type: Grant
    Filed: October 21, 1988
    Date of Patent: December 12, 1989
    Assignee: The Dow Chemical Company
    Inventors: William A. Kleschick, Robert J. Ehr, Mark J. Costales, Ben C. Gerwick, III, Richard W. Meikle, deceased, William T. Monte, Norman R. Pearson
  • Herbicidal method with improved crop tolerance
    Patent number: 4874421
    Abstract: The selectivity of aryloxyphenoxypropanoate herbicides, such as methyl 2-(4-((3-chloro-5-(trifluoromethyl)-2-pyridinyl)oxy)phenoxy)propanoate, when used for the control of weeds in grassy crops, such as rice, can be improved by pre-treating the grassy crop seeds or plants with an amount of an aryloxyphenoxypropanoate herbicide sufficient to elevate the acetyl-coenzyme A carboxylase enzyme activity level, but insufficient to cause phytotoxicity.
    Type: Grant
    Filed: June 14, 1988
    Date of Patent: October 17, 1989
    Assignee: The Dow Chemical Company
    Inventors: William A. Kleschick, Jacob Secor, Theodore W. Holmsen
  • Sulfonamides derived from substituted 2-amino-1,2,4-triazolo (1,5-a) pyrimidines and compositions and methods of controlling undesired vegetation
    Patent number: 4822404
    Abstract: Novel compounds, e.g., N-(5,7-dimethyl-1,2,4-triazolo [1,5-a]pyrimidin-2-yl)-2-thiophene sulfonamide and their compositions and use in the control of weeds.
    Type: Grant
    Filed: October 20, 1987
    Date of Patent: April 18, 1989
    Assignee: The Dow Chemical Company
    Inventor: William A. Kleschick
  • Substituted 1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonamides, compositions containing them, and their utility as herbicides
    Patent number: 4818273
    Abstract: Novel substituted triazolo[1,5-a]pyrimidine-2-sulfonamides, e.g., 5,7-dimethyl-N-(2,6-dichlorophenyl)-1,2,4-triazolo[1,5-a]pyrimidine-2-sulf onamide and their agriculturally acceptable salts are prepared. These compounds and compositions containing them are useful for the control of unwanted vegetation. Novel substituted triazolo[1,5-a]pyrimidine-2-sulfonyl chlorides and substituted anilines and their use as intermediates are also described.
    Type: Grant
    Filed: December 10, 1986
    Date of Patent: April 4, 1989
    Assignee: The Dow Chemical Company
    Inventors: William A. Kleschick, Robert J. Ehr, Mark J. Costales, Ben C. Gerwick, III, Richard W. Meikle, deceased, William T. Monte, Pearson, Norman R.
  • Herbicidal imidazolo(1,2-a)pyrimidine-2-sulfonanilides
    Patent number: 4799952
    Abstract: Novel substituted imidazolo[1,2-a[pyrimidine-2-sulfonanilides are prepared are prepared from novel substituted imidazolo[1,2-a]pyrimidine-2-sulfonic acids by conversion to the corresponding sulfonyl halides and condensation with substituted anilines and by other methods. N-(2,6-difluorophenyl)-3-chloro-4,6-dimethylimidazolo[1,2-a]pyrimidine-2-s ulfonamide is typical of the compounds prepared. The compounds are useful general and selective pre- and post-emergence herbicides.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: January 24, 1989
    Assignee: The Dow Chemical Company
    Inventors: Norman R. Pearson, Shannon L. Bartley, William A. Kleschick
  • Process for the preparation of intermediates useful for making herbicidal sulfonamides derived from substituted 2-amino-1,2,4-triazolo(1,5-A)pyrimidines
    Patent number: 4772720
    Abstract: Sulfonamides derived from substituted 2-amino-1,2,4-triazolo[1,5-a]pyrimidines are prepared by reacting a desired sulfonamide with dimethyl N-cyanodithioiminocarbonate in the presence of a base followed by reaction with an excess of hydrazine and then a 1,3-dicarbonyl compound.The resulting products have a variety of herbicidal uses.
    Type: Grant
    Filed: August 8, 1986
    Date of Patent: September 20, 1988
    Assignee: The Dow Chemical Company
    Inventors: William A. Kleschick, Anna P. Vinogradoff, Joseph E. Dunbar
  • Novel substituted 1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonamides and compositions and method for inhibiting pollen formation in corn
    Patent number: 4755212
    Abstract: Novel compounds, e.g., 5,7-dimethyl-N-(2,6-dichlorolphenyl)-1,2,4-triazolo[1,5-a]pyrimidine-2-sul fonamide and their compositions and use in the control of weeds and in the suppression of nitrification of ammonium nitrogen in soil. Other novel compounds and their compositions and use in the inhibition of bolting in sugar beets. Other novel compounds and their compositions and use as plant gametocides.
    Type: Grant
    Filed: November 21, 1986
    Date of Patent: July 5, 1988
    Assignee: The Dow Chemical Company
    Inventors: William A. Kleschick, Ben C. Gerwick, III, Robert J. Ehr, William T. Monte, Norman R. Pearson, Richard W. Meikle, Mark J. Costales
  • Substituted 1,2,4-triazolo[1,5-a]-pyrimidine-2-sulfonamides and compositions and methods of controlling undesired vegetation and inhibiting sugar beet bolting
    Patent number: 4741764
    Abstract: Novel compounds, e.g., 5,7-dimethyl-N-(2,6-dichlorolphenyl)-1,2,4-triazolo[1,5-a]pyrimidine-2-sul fonamide and their compositions and use in the control of weeds and in the suppression of nitrificatin of ammonium nitrogen in soil. Other novel compounds and their compositions and use in the inhibition of bolting in sugar beets. Other novel compounds and their compositions and use as plant gametocides.
    Type: Grant
    Filed: November 21, 1986
    Date of Patent: May 3, 1988
    Assignee: The Dow Chemical Company
    Inventors: William A. Kleschick, Ben C. Gerwick, III, Robert J. Ehr, William T. Monte, Norman R. Pearson, Richard W. Meikle, Mark J. Costales
  • Substituted 1,2,4-triazolo[1,5-a]-pyrimidine-2-sulfonamides and compositions and methods of controlling undesired vegetation and suppressing the nitrification of ammonium nitrogen in soil
    Patent number: 4740233
    Abstract: Novel compounds, e.g., 5,7-dimethyl-N-(2,6-dichlorolphenyl)-1,2,4-triazolo[1,5-a]pyrimidine-2-sul fonamide and their compositions and use in the control of weeds and in the suppression of nitrification of ammonium nitrogen in soil. Other novel compounds and their compositions and use in the inhibition of bolting in sugar beets. Other novel compounds and their compositions and use as plant gametocides.
    Type: Grant
    Filed: November 17, 1986
    Date of Patent: April 26, 1988
    Assignee: The Dow Chemical Company
    Inventors: William A. Kleschick, Robert J. Ehr, Ben C. Gerwick, III, William T. Monte, Norman R. Pearson, Mark J. Costales, Richard W. Meikle
  • Imidazo[1,2-a]pyrimidine sulfonic acids and acid halides
    Patent number: 4731446
    Abstract: Novel substituted imidazolo[1,2-a]pyrimidine-2-sulfonanilides are prepared from novel substituted imidazolo[1,2-a]pyrimidine-2-sulfonic acids by conversion to the corresponding sulfonyl halides and condensation with substituted anilines and by other methods. N-(2,6-difluorophenyl)-3-chloro-4,6-dimethylimidazolo[1,2-a]pyrimidine-2-s ulfonamide is typical of the compounds prepared. The compounds are useful general and selective pre- and post-emergence herbicides.
    Type: Grant
    Filed: May 1, 1987
    Date of Patent: March 15, 1988
    Assignee: The Dow Chemical Company
    Inventors: Norman R. Pearson, William A. Kleschick, Shannon L. Bartley
  • Sulfonamides derived from substituted 2-amino-1,2,4-triazolo[1,5-a]-1,3,5-triazines and compositions and methods of controlling undesired vegetation
    Patent number: 4685958
    Abstract: Novel compounds, e.g., N-(5,7-dimethyl-1,2,4-triazolo[1,5-a]-1,3,5-triazin-2-yl)-(2-chlorobenzene sulfonamide) and their compositions and use in the control of weeds.
    Type: Grant
    Filed: May 6, 1986
    Date of Patent: August 11, 1987
    Assignee: The Dow Chemical Company
    Inventors: Norman R. Pearson, William A. Kleschick
  • Process for the preparation of herbicidal sulfonamides
    Patent number: 4650892
    Abstract: Sulfonamides derived from substituted 2-amino-1,2,4-triazolo[1,5-a]pyrimidines are prepared by reacting a desired sulfonamide with dimethyl N-cyanodithioiminocarbonate in the presence of a base followed by reaction with an excess of hydrazine and then a 1,3-dicarbonyl compound.The resulting products have a variety of herbicidal uses.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: March 17, 1987
    Assignee: The Dow Chemical Company
    Inventors: William A. Kleschick, Anna P. Vinogradoff, Joseph E. Dunbar
  • Herbicidal sulfonamides
    Patent number: 4638075
    Abstract: Sulfonamides derived from substituted 2-amino-1,2,4-triazolo[1,5-a]pyrimidines are prepared by reacting a desired sulfonamide with dimethyl N-cyanodithioiminocarbonate in the presence of a base followed by reaction with an excess of hydrazine and then a 1,3-dicarbonyl compound.The resulting products have a variety of herbicidal uses.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: January 20, 1987
    Assignee: The Dow Chemical Company
    Inventors: William A. Kleschick, Anna P. Vinogradoff, Joseph E. Dunbar
  • 1,2,4-triazolo[1,5-a]-1,3,5-triazine-2-sulfonamides and compositions and methods of controlling undesired vegetation
    Patent number: 4605433
    Abstract: Novel compounds, e.g., 5,7-dimethyl-N-(2,6-dichlorophenyl)-1,2,4-triazolo[1,5a]-1,3,5-triazine-2- sulfonamide and their compositions and use in the control of weeds and in the suppression of nitrification of ammonium nitrogen in soil.
    Type: Grant
    Filed: May 30, 1985
    Date of Patent: August 12, 1986
    Assignee: The Dow Chemical Company
    Inventors: Norman R. Pearson, William A. Kleschick
  • Process for making optically active esters of phenoxyphenoxypropionic acids or pyridyloxyphenoxypropionic acids
    Patent number: 4532328
    Abstract: Process for making optically active esters having an enhanced optical purity by reacting a mole of an appropriate substrate phenol with a molar excess of an appropriate optically active ester.
    Type: Grant
    Filed: July 14, 1983
    Date of Patent: July 30, 1985
    Assignee: The Dow Chemical Company
    Inventor: William A. Kleschick
  • Selective preparation of isomers and enantiomers of cyclopropane carboxylic acids
    Patent number: 4515956
    Abstract: A process has been discovered for selective preparation of isomers and enantiomers of 2,2-dimethyl-3-(2,2-dihalovinyl)cyclopropane carboxylic acids. In this process an adduct of an alkyl 3,3-dimethyl-4-pentenoate and a substituted 2-oxazolidone is reacted with a substituted dihalomethane compound. The resulting compound is cyclized, dehydrohalogenated and hydrolyzed to yield the desired product. These cyclopropane carboxylic acids are useful precursors for pyrethroid insecticides.
    Type: Grant
    Filed: August 13, 1984
    Date of Patent: May 7, 1985
    Assignee: The Dow Chemical Company
    Inventor: William A. Kleschick
  • Selective preparation of isomers and enantiomers of cyclopropane carboxylic acids
    Patent number: 4479005
    Abstract: A process has been discovered for selective preparation of isomers and enantiomers of 2,2-dimethyl-3-(2,2-dihalovinyl)cyclopropane carboxylic acids. In this process an adduct of an alkyl 3,3-dimethyl-4-pentenoate and a substituted 2-oxazolidone is reacted with a substituted dihalomethane compound. The resulting compound is cyclized, dehydrohalogenated and hydrolyzed to yield the desired product. These cyclopropane carboxylic acids are useful precursors for pyrethroid insecticides.
    Type: Grant
    Filed: December 16, 1982
    Date of Patent: October 23, 1984
    Assignee: The Dow Chemical Company
    Inventor: William A. Kleschick