Patents by Inventor Charles P. Grasso

Charles P. Grasso 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).

  • Method for enhancing the herbicidal activity of formulations containing solid imidazolinyl benzoic acid esters with bisulfate
    Patent number: 5250502
    Abstract: There is provided a method for enhancing the biological activity of herbicidal formulations of solid, imidazolinyl benzoic acid esters by adjusting the pH of the formulations, when diluted for spray application, to a pH of about 1.0 to 3.8 by the addition of an alkali metal bisulfate, ammonium bisulfate or a mixture thereof.The invention also relates to a stable, non-aqueous, solid formulations of an imidazolinyl benzoic acid ester and an alkali metal bisulfate, ammonium bisulfate or a mixture thereof.
    Type: Grant
    Filed: April 1, 1992
    Date of Patent: October 5, 1993
    Assignee: American Cyanamid Company
    Inventor: Charles P. Grasso
  • Process for the preparation of 2-(4-hydroxyphenyl)-3-methylbutyric acid
    Patent number: 4537988
    Abstract: An integrated process for the preparation of 2-(4-hydroxyphenyl)-3-methylbutyric acid from the corresponding 2-(4-chlorophenyl)-3-methylbutyronitrile through hydrolysis of the nitrile by strong base to the corresponding carboxylic acid followed by formation of the corresponding phenol by nucleophilic displacement of the chlorine with a strong base in the presence of copper salts, and if so desired metallic copper, is described.
    Type: Grant
    Filed: June 6, 1983
    Date of Patent: August 27, 1985
    Assignee: American Cyanamid Company
    Inventor: Charles P. Grasso
  • Method for the alkylation of phenylacetonitriles
    Patent number: 4377531
    Abstract: A method for the alkylation of certain substituted phenylacetonitriles with alkylhalides in the presence of solid particulated alkali metal hydroxides under essentially anhydrous conditions. Trialkylamine catalysts may optionally be utilized. Compounds obtained by this method, some of which are valuable intermediates in the preparation of pyrethroid pesticides, are described.
    Type: Grant
    Filed: October 7, 1981
    Date of Patent: March 22, 1983
    Assignee: American Cyanamid Company
    Inventor: Charles P. Grasso
  • Process for the preparation of sulfur ylide intermediates of insecticidal pyrethroids
    Patent number: 4359580
    Abstract: The invention is an improved process for the preparation of lower alkyl esters of tetrahydrothiophenium carboxymethylide intermediates of insecticidal pyrethroids, and to insecticidal prethroids derived from said ylides.
    Type: Grant
    Filed: February 12, 1981
    Date of Patent: November 16, 1982
    Assignee: American Cyanamid Company
    Inventor: Charles P. Grasso