Patents by Inventor Norman R. Pearson

Norman R. Pearson 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).

  • 7-ethoxy-5-fluoromethyl-1,2,4-triazole[1,5-a]-pyrimidine-2-sulfonamindes
    Patent number: 4959473
    Abstract: N-(Substituted-phenyl)-7-ethoxy-5-fluoromethyl-1,2,4-triazolo[1,5-a]pyrimid ine-2-sulfonamides are prepared from 2-benzylthio-5-fluoromethyl-1,2,4-triazolo[1,5-a]pyrimidines and found to be herbicidal. The compounds, illustrated by 7-ethoxy-5-fluoromethyl-(2,6-dichloro-3-methylphenyl)-1,2,4-triazolo[1,5-a ]pyrimidine-2-sulfonamide, are degradable in the soil and are selective to wheat.
    Type: Grant
    Filed: April 19, 1988
    Date of Patent: September 25, 1990
    Assignee: The Dow Chemical Company
    Inventors: Norman R. Pearson, William A. Kleschick, Chrislyn M. Carson
  • Substituted 1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonamides, compositions containing them, and their utility as herbicides
    Patent number: 4954163
    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: September 13, 1989
    Date of Patent: September 4, 1990
    Assignee: The Dow Chemical Company
    Inventors: William A. Kleschik, Robert J. Ehr, Mark J. Costales, Ben C. Gerwick, III, Richard W. Meikle, deceased, William T. Monte, Norman R. Pearson
  • 5-Fluoromethyl-1,2,4-triazolo(1,5-A)-pyrimidines
    Patent number: 4904301
    Abstract: N-(Substituted-phenyl)-5-fluoromethyl-1,2,4-triazolo[1,5-a]pyrimidine-2-sul fonamides are prepared from 2-benzylthio-5-fluoromethyl-1,2,4-traizolo[1,5-a]pyrimidines and found to to be herbicidal. The compounds, illustrated by 5-fluoromethyl-7-methoxy-(2,6-dichloro-3-methylphenyl)-1,2,4-triazolo[1,5- a]pyrimidine-2-sulfonamide, are degradable in the soil.
    Type: Grant
    Filed: April 19, 1988
    Date of Patent: February 27, 1990
    Assignee: The Dow Chemical Company
    Inventors: Norman R. Pearson, William A. Kleschick, Chrislyn M. Carson
  • 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 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
  • 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
  • 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