Patents by Inventor Steven A. Roman

Steven A. Roman 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).

  • Insecticidal sulfonium salts
    Patent number: 4044128
    Abstract: Novel insecticidal sulfonium salts of 2-(alkylthio)ethyl esters of alpha-nitro-alpha(tetrahydro-2H-1,3-thiazin-2-ylidene)acetic acids.
    Type: Grant
    Filed: June 10, 1976
    Date of Patent: August 23, 1977
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • Insecticidal oxime derivatives
    Patent number: 4041027
    Abstract: Insecticidal O-substituted derivatives of 5,6-dihydro-4H-1,3-thiazine-2-carboxaldehyde oxime.
    Type: Grant
    Filed: August 23, 1976
    Date of Patent: August 9, 1977
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • N-(Arylsulfonyl)-2-nitro -2-(1-methyl-2-(1,3-diazacycloalkylidene)acetamides
    Patent number: 4029791
    Abstract: N-(Arylsulfonyl)-2-nitro-2-(1-alkyl-2-(1,3-diazacycloalkylidene)acetamides, useful as insecticides, having the formula ##STR1## wherein n, R.sup.1 and R.sup.2 are as defined in the specification.
    Type: Grant
    Filed: June 17, 1976
    Date of Patent: June 14, 1977
    Assignee: Shell Oil Company
    Inventors: Willy D. Kollmeyer, Steven A. Roman, Samuel B. Soloway
  • S-Esters of nitro(tetrahydro-2H-1,3-thiazin-2-ylidene)ethanethioic acid
    Patent number: 4024254
    Abstract: Novel insecticidal S-esters of nitro(tetrahydro-2H-1,3-thiazin-2-ylidene)ethanethioic acid.
    Type: Grant
    Filed: March 11, 1976
    Date of Patent: May 17, 1977
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • Alpha-(halophenoxy)acetyl nitromethylene tetrahydrothiazines
    Patent number: 4024138
    Abstract: Novel compounds, identified in the title, useful as insecticides and herbicides.
    Type: Grant
    Filed: April 26, 1976
    Date of Patent: May 17, 1977
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • 3-Oxomethyl-2-(1-nitro-2-oxoethylidene)-tetrahydro-2H-1,3-thiazines
    Patent number: 4022775
    Abstract: Novel compounds defined in the title, useful as insecticides.
    Type: Grant
    Filed: March 3, 1976
    Date of Patent: May 10, 1977
    Assignee: Shell Oil Company
    Inventors: Steven A. Roman, James E. Powell
  • 3-Oxomethyl-2-(1-nitro-2-oxoethylidene)-tetrahydro-2H-1,3-thiazines
    Patent number: 4020061
    Abstract: Novel compounds defined in the title, useful as insecticides and herbicides.
    Type: Grant
    Filed: March 3, 1976
    Date of Patent: April 26, 1977
    Assignee: Shell Oil Company
    Inventors: Steven A. Roman, James E. Powell
  • N-(nitro(tetrahydro-2H-1,3-thiazin-2-ylidene)acetyl)benzamides
    Patent number: 4013766
    Abstract: Novel compounds, identified in the title, useful as insecticides.
    Type: Grant
    Filed: March 26, 1976
    Date of Patent: March 22, 1977
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • 2-(Nitromethylene)-1,3-diazacycloalkane insect control agents
    Patent number: 4002765
    Abstract: Use as insecticides of, and insecticidal compositions containing, certain 2-(nitromethylene)imidazolidines.
    Type: Grant
    Filed: November 7, 1975
    Date of Patent: January 11, 1977
    Assignee: Shell Oil Company
    Inventors: Charles H. Tieman, Willy D. Kollmeyer, Steven A. Roman
  • N-(sulfur-substituted)-2H-1,3-thiazin-2-ylidene nitromethyl ketones and nitroacetic acid esters
    Patent number: 3985736
    Abstract: Novel compounds, identified in the title, useful as insecticides.
    Type: Grant
    Filed: July 2, 1975
    Date of Patent: October 12, 1976
    Assignee: Shell Oil Company
    Inventors: James E. Powell, Steven A. Roman
  • Insecticidal sulfonium salts
    Patent number: 3976772
    Abstract: Novel insecticidal sulfonium salts of 2-(alkylthio)-ethyl esters of a .alpha.-nitro-.alpha.-(tetrahydro-2H-1,3-oxazine-2-ylidene)-acetic acids.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: August 24, 1976
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • 2-(Nitromethylene)-1,3-diazepines
    Patent number: 3971774
    Abstract: Novel insecticidal 2-(nitromethylene)-1,3-diazacycloalkanes.
    Type: Grant
    Filed: November 7, 1975
    Date of Patent: July 27, 1976
    Assignee: Shell Oil Company
    Inventors: Charles H. Tieman, Willy D. Kollmeyer, Steven A. Roman
  • 2-(Nitromethylene)-hexahydropyrimidines
    Patent number: 3969354
    Abstract: Novel insecticidal 2-(nitromethylene)-1,3-diazacycloalkanes.
    Type: Grant
    Filed: November 7, 1975
    Date of Patent: July 13, 1976
    Assignee: Shell Oil Company
    Inventors: Charles H. Tieman, Willy D. Kollmeyer, Steven A. Roman
  • 2-(Halonitro(organooxycarbonyl)methyl)-5,6-dihydro-4H-1,3-thiazines
    Patent number: 3962233
    Abstract: Novel insecticidal 2-(halonitro(organooxycarbonyl)-methyl)-5,6-dihydro-4H-1,3-thiazines.
    Type: Grant
    Filed: February 19, 1975
    Date of Patent: June 8, 1976
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • Esters of nitro(tetrahydro-2H-1,3-thiazin-2-ylidene)acetic acids
    Patent number: 3962234
    Abstract: Novel insecticidal esters of nitro(tetrahydro-2H-1,3-thiazin-2-ylidene)acetic acids.
    Type: Grant
    Filed: March 3, 1975
    Date of Patent: June 8, 1976
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • 2-(Nitromethylene)-1,3-diazacycloalkane insect control agents
    Patent number: 3948934
    Abstract: Insectidal 2-(nitromethylene)-1,3-diazacycloalkanes are disclosed.
    Type: Grant
    Filed: September 27, 1974
    Date of Patent: April 6, 1976
    Assignee: Shell Oil Company
    Inventors: Charles H. Tieman, Willy D. Kollmeyer, Steven A. Roman