Patents Represented by Attorney Merlin B. Davey

Find this attorney in the Justia Lawyer Directory

  • 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
  • Certain 3,5-disubstituted-2-pyridyloxy-fluorophenoxy-alkanoic acids, derivatives thereof and herbicidal properties
    Patent number: 4750931
    Abstract: Certain novel fluorophenoxy compounds, principally aryloxyfluorophenoxyalkanoic acids and derivatives thereof, are described. More specifically, these novel compounds bear 1 to 4 fluorine substituents on the phenyl ring. These novel compounds exhibit surprising preemergent and postemergent activity when used according to the method of the invention in the control of grassy weeds.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: June 14, 1988
    Assignee: The Dow Chemical Company
    Inventor: Richard B. Rogers
  • 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
  • Novel sulfonamides and method of making
    Patent number: 4734123
    Abstract: N-aryl-5,6,7-substituted-1,2,4,-triazolo-[1,5-a]pyrimidine-2-sulfonamides undergo oxidative ring cleavage to afford herbicidal substituted N-aryl-5-amino-1,2,4-triazole-3-sulfonamides. These triazolesulfonamides can undergo cyclizations with 1,3-dicarbonyls to form novel herbicidal substituted N-aryl-5,6,7-substituted-1,2,4-triazolo-[1,5-a]pyrimidine-2-sulfonamides.
    Type: Grant
    Filed: May 6, 1986
    Date of Patent: March 29, 1988
    Assignee: The Dow Chemical Company
    Inventor: William T. Monte
  • Method of selectively chlorinating 2-chloro-5-(trichloromethyl) pyridine in the 3-position
    Patent number: 4701532
    Abstract: The selective chlorination of 2-chloro-5-(trichloromethyl)pyridine in the 3-position is achieved by reacting 2-chloro-5-(trichloromethyl)pyridine in the liquid phase with an effective amount of Cl.sub.2 at an elevated pressure and elevated temperature in the absence of an added catalyst.
    Type: Grant
    Filed: March 27, 1986
    Date of Patent: October 20, 1987
    Assignee: The Dow Chemical Company
    Inventors: Paula L. Humphreys, Thomas J. Dietsche, James L. Bixby
  • 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
  • Method of preparing esters of aryloxyphenoxy propanoic acid
    Patent number: 4681941
    Abstract: An improved method of preparing aryloxyphenoxy propanoic acid esters is disclosed. Low-water levels and low temperatures increase the yield and decrease by-product formation. A hindered non-nucleophilic phenol, which is converted in situ to the phenate form, is added to the reaction mixture to drive the reaction to 99+% conversion.
    Type: Grant
    Filed: April 11, 1985
    Date of Patent: July 21, 1987
    Assignee: The Dow Chemical Company
    Inventor: Timothy J. Adaway
  • Certain pyridyloxy or thio-phenoxy-propanoic acids or salts thereof useful as herbicides
    Patent number: 4678509
    Abstract: Certain novel pyridinyloxyphenoxy alkanoic acids, pyridinylthiophenoxy alkanoic acids, derivatives thereof and related compounds are described. More specifically, these novel compounds bear a fluorine substituent in the 3-position of the pyridinyl group and in the 5-position the substituent is selected from chlorine, CF.sub.3, CF.sub.2 Cl or CF.sub.2 H. These novel compounds exhibit surprising preemergent and postemergent activity in the control of grassy weeds.
    Type: Grant
    Filed: November 1, 1985
    Date of Patent: July 7, 1987
    Assignee: The Dow Chemical Company
    Inventors: Howard Johnston, Lillian H. Troxell
  • 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
  • Preparation of (trifluoromethyl)pyridines
    Patent number: 4650875
    Abstract: (Trichloromethyl)pyridine compounds are reacted in the liquid phase with HF in the presence of a metal halide catalyst at superatmospheric pressures to form (trifluoromethyl)pyridine compounds in a high yield.
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: March 17, 1987
    Assignee: The Dow Chemical Company
    Inventor: George S. Fujioka
  • 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
  • Preparation of 2,3-dichloro-5-trichloromethylpyridine
    Patent number: 4636565
    Abstract: Preparation of 2,3-dichloro-5-trichloromethylpyridine in high yields and purity by chlorinating 2-chloro-5-trichloromethylpyridine at 70.degree. to 250.degree. C. with chlorine in the presence of a catalyst containing one or more molybdenum, tungsten or ruthenium compounds.
    Type: Grant
    Filed: March 13, 1985
    Date of Patent: January 13, 1987
    Assignee: The Dow Chemical Company
    Inventors: John A. Werner, Charles A. Wilson, Craig E. Mixan
  • 2,3-difluoro-5-(trifluoromethyl)pyridine
    Patent number: 4625035
    Abstract: Novel 2,3-difluoro-5-(trifluoromethyl)pyridine is prepared by fluorinating 3-chloro-2-fluoro-5-(trifluoromethyl)pyridine under favorable conditions. The compound is useful as a chemical intermediate in the preparation of herbicides.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: November 25, 1986
    Assignee: The Dow Chemical Company
    Inventor: John A. Werner
  • 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
  • Derivatives of biologically active substituted tin compounds, emulsifiable concentrates of said derivatives and method of controlling plant infestations
    Patent number: 4581373
    Abstract: A derivative of a biologically active substituted tin compound with a lipophilic strong acid containing sulphur or phosphorus, or a salt thereof. These derivatives are readily soluble in organic liquids and are thus readily formulated as emulsifiable concentrates.
    Type: Grant
    Filed: January 19, 1983
    Date of Patent: April 8, 1986
    Assignee: The Dow Chemical Company
    Inventors: Patrick J. Mulqueen, Robert Dutton
  • Chlorine exchange for fluorine in 2-fluoropyridine compounds
    Patent number: 4567274
    Abstract: A method of exchanging a chlorine atom for a fluorine atom at the 2-position of a 2-fluoropyridine compound which comprises contacting a 2-fluoropyridine compound with a substituted or unsubstituted trichloromethyl or dichlorofluoromethyl alpha, beta or gamma picoline compound at a temperature of 50.degree.-250.degree. C. and a pressure of atmospheric to about 100 psig.
    Type: Grant
    Filed: November 26, 1984
    Date of Patent: January 28, 1986
    Assignee: The Dow Chemical Company
    Inventors: Janice E. Gatlin, Mark A. Van Dort, Charles A. Wilson, Alexander P. Fung
  • Pyridyl(oxy/thio)phenoxy compounds, herbicidal compositions and methods
    Patent number: 4565568
    Abstract: Certain novel pyridinyloxyphenoxy alkanoic acids, pyridinylthiophenoxy alkanoic acids, derivatives thereof and related compounds are described. More specifically, these novel compounds bear a fluorine substituent in the 3-position of the pyridinyl group and in the 5-position the substituent is selected from chlorine, CF.sub.3, CF.sub.2 Cl or CF.sub.2 H. These novel compounds exhibit surprising preemergent and postemergent activity in the control of grassy weeds.
    Type: Grant
    Filed: May 23, 1983
    Date of Patent: January 21, 1986
    Assignee: The Dow Chemical Company
    Inventors: Howard Johnston, Lillian H. Troxell
  • Substituted pyridyl compounds, herbicidal compositions and method of use
    Patent number: 4474602
    Abstract: Substituted pyridyl compounds, e.g. 2,6-dichloro-4(2-(2,2,2-trichloroethyl)oxiranyl) pyridine; herbicidal compositions containing such compounds and method for the control of undesired vegetation using these compositions.
    Type: Grant
    Filed: January 19, 1982
    Date of Patent: October 2, 1984
    Assignee: The Dow Chemical Company
    Inventors: Lowell D. Markley, John M. Soper
  • Glazier's punch
    Patent number: 4354701
    Abstract: A glazier's punch having an inverted T-shape and a generally flat slightly longitudinally concave face, the punch being adapted for easy holding and for good contact with thin fasteners such as a glazier's point or small brad.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: October 19, 1982
    Inventor: Wilbur A. Marshall