Patents by Inventor Albert A. Cevasco

Albert A. Cevasco 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).

  • Process for the manufacture of cycloalkyl and haloalkyl o-aminophenyl ketones
    Patent number: 5405998
    Abstract: There is provided an improved method for the production of o-aminophenyl ketones of formula I wherein R is C.sub.3 -C.sub.6 cycloalkyl or C.sub.1 -C.sub.6 haloalkyl. ##STR1## Compounds of formula I are key intermediates in the manufacture of sulfamoyl urea herbicides.
    Type: Grant
    Filed: November 30, 1993
    Date of Patent: April 11, 1995
    Assignee: American Cyanamid Company
    Inventor: Albert A. Cevasco
  • Process for the preparation of o-aminophenyl cyclo-propyl ketone
    Patent number: 5362911
    Abstract: There is provided an effective method for the preparation of o-aminophenyl cyclopropyl ketone via the dehydrohalogenation of 1-(o-aminophenyl)-4-halo-1-butanone in the presence of a base and a phase transfer catalyst.
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: November 8, 1994
    Assignee: American Cyanamid Company
    Inventor: Albert A. Cevasco
  • Process for the preparation of substituted and unsubstituted-2,3-pyridinedicarboxylates from chloromaleate or chlorofumurate or mixtures thereof
    Patent number: 5286868
    Abstract: There is provided a process for the preparation of dialkyl pyridinedicarboxylate compounds and derivatives thereof by reacting a dialkyl chloromaleate or chlorofumarate or a mixture thereof with an ammonium salt optionally in the presence of ammonia and an appropriately substituted .alpha.,.beta.-unsaturated aldehyde or ketone.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: February 15, 1994
    Assignee: American Cyanamid Company
    Inventors: Albert A. Cevasco, George A. Chiarello, William F. Rieker
  • Process for the preparation of dialkyl pyridine-2,3-dicarboxylate and derivatives thereof from dialkyl dichlorosuccinate
    Patent number: 5225560
    Abstract: There is provided a process for the preparation of substituted and unsubstituted-2,3-pyridinedicarboxylate compounds by reacting a dialkyl dichlorosuccinate with a dehydrohalogenating agent, an ammonia source and an appropriately substituted .alpha.,.beta.-unsaturated aldehyde or ketone.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: July 6, 1993
    Assignee: American Cyanamid Company
    Inventors: Albert A. Cevasco, George A. Chiarello, William F. Rieker
  • Process for the manufacture of halomaleic and halofumaric esters
    Patent number: 5214198
    Abstract: There is provided a method of manufacture of dialkyl monohalomaleate and dialkyl monohalofumarate and mixtures thereof via a dehydrohalogenation of the appropriate dialkyl dihalosuccinate precursor in the presence of an aqueous base and a phase transfer catalyst.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: May 25, 1993
    Assignee: American Cyanamid Company
    Inventor: Albert A. Cevasco
  • Process for the preparation of dialkyl pyridine-2,3-dicarboxylate and derivatives thereof from dialkyl dichlorosuccinate
    Patent number: 5124458
    Abstract: There is provided a process for the preparation of substituted and unsubstituted-2,3-pyridinedicarboxylate compounds by reacting a dialkyl dichlorosuccinate with a dehydrohalogenating agent, an ammonia source and an appropriately substituted .alpha.,.beta.-unsaturated aldehyde or ketone.
    Type: Grant
    Filed: June 15, 1990
    Date of Patent: June 23, 1992
    Assignee: American Cyanamid Company
    Inventors: Albert A. Cevasco, George A. Chiarello, William F. Rieker
  • Process for the preparation of substituted and unsubstituted-2,3-pyridinedicarboxylates from chloromaleate or chlorofumarate or mixtures thereof
    Patent number: 5118809
    Abstract: There is provided a process for the preparation of dialkyl pyridinedicarboxylate compounds and derivatives thereof by reacting a dialkyl chloromaleate or chlorofumarate or a mixture thereof with an ammonium salt optionally in the presence of ammonia and an appropiately substituted .alpha.,.beta.-unsaturated aldehyde or ketone.
    Type: Grant
    Filed: June 15, 1990
    Date of Patent: June 2, 1992
    Assignee: American Cyanamid Company
    Inventors: Albert A. Cevasco, George A. Chiarello, William F. Rieker
  • Method for the preparation of dialkyl dichlorosuccinates
    Patent number: 4996350
    Abstract: The present invention relates to an improved method for the preparation of dialkyl dichlorosuccinates by chlorination of a dialkyl maleate in the presence of a catalytic amount of a C.sub.1 -C.sub.4 alkyl alcohol in the absence of a solvent which are useful intermediates in the preparation of anilinofumarates. Anilinofumarates are, in turn, used in the preparation of 2-(2-imidazolin-2-yl)quinoline-3-carboxylic acid herbicidal agents.
    Type: Grant
    Filed: November 17, 1989
    Date of Patent: February 26, 1991
    Assignee: American Cyanamid Company
    Inventor: Albert A. Cevasco
  • Process for the manufacture of anilinofumarate via chloromaleate or chlorofumarate or mixtures thereof
    Patent number: 4904816
    Abstract: There is provided a novel process for the manufacture of anilinofumarate via chloromaleate or chlorofumarate or mixtures thereof.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: February 27, 1990
    Assignee: American Cyanamid Company
    Inventors: Albert A. Cevasco, Donald Roy
  • Method for the preparation of anilinofumarate
    Patent number: 4814486
    Abstract: The present invention relates to an improved method for the preparation of anilinofumarates useful as intermediates in the preparation of 2-(2-imidazolin-2-yl) quinoline-3-carboxylic acid herbicidal agents.
    Type: Grant
    Filed: October 1, 1987
    Date of Patent: March 21, 1989
    Assignee: American Cyanamid Company
    Inventors: Donald R. Maulding, Albert A. Cevasco