Patents by Inventor Henry L. Strong

Henry L. Strong 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).

  • Substituted quinoline herbicide intermediates and process
    Patent number: 5625068
    Abstract: The invention is herbicide 3-substituted quinoline intermediates and a method for the synthesis of the herbicide intermediates 3-alkoxymethyl substituted quinolines.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: April 29, 1997
    Assignee: American Cyanamid Company
    Inventor: Henry L. Strong
  • Coversion of substituted 8-chloroquinolines to substituted 8-hydroxyquinolines
    Patent number: 5597924
    Abstract: The invention is a process for preparing substituted 8-hydroxyquinolines from substituted 8-chloroquinolines.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: January 28, 1997
    Assignee: American Cyanamid Company
    Inventors: Robert S. Marmor, Henry L. Strong
  • 5,6-disubstituted-3-pyridylmethyl ammonium halide compounds useful for the preparation of 5-(substituted methyl)-2,3-pyridinedicarboxylic acids
    Patent number: 5545835
    Abstract: There are provided 5,6-disubstituted-3-pyridylmethyl ammonium halide compounds, a method for the preparation thereof and the use thereof for the preparation of 5-(substituted methyl)-2,3-pylidinedicarboxylic acids.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: August 13, 1996
    Assignee: American Cyanamid Company
    Inventor: Henry L. Strong
  • Process for the manufacture of 2-alkoxymethylacrolein
    Patent number: 5506360
    Abstract: There is provided a process for the manufacture of 2-alkoxymethylacrolein compounds via the reaction of an appropriate alcohol and acrolein in the presence of an acid and a trisubstituted amine to form an intermediate and the subsequent reaction of the intermediate with formaldehyde in the presence of an acid and a disubstituted amine. There is also provided a process for the manufacture of 3-alkoxymethylquinolines from 2-alkoxymethylacrolein.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: April 9, 1996
    Assignee: American CYanamid Company
    Inventors: Henry L. Strong, David A. Cortes, Zareen Ahmed
  • Preparation of substituted-2,3-dicarboxypyridinium nitrates
    Patent number: 5410062
    Abstract: There are provided crystalline substituted-2,3-dicarboxypyridinium nitrate salts, the preparation thereof and the use thereof in the isolation and purification of important substituted pyridinedicarboxylic acid herbicide intermediates.
    Type: Grant
    Filed: February 2, 1994
    Date of Patent: April 25, 1995
    Assignee: American Cyanamid Company
    Inventor: Henry L. Strong
  • Process for the manufacture of cyclopropylnitrile
    Patent number: 5380911
    Abstract: An improved manufacturing procedure for the preparation and isolation of cyclopropylnitrile is provided. 4-Halobutyronitrile is reacted with an alkali metal base in the presence of an aprotic polar solvent, an inorganic salt and a catalytic amount of water at an elevated temperature. The reaction product cyclopropylnitrile is isolated by azeotropic distillation.
    Type: Grant
    Filed: December 2, 1993
    Date of Patent: January 10, 1995
    Assignee: American Cyanamid Company
    Inventor: Henry L. Strong
  • 5,6-disubstituted-3-pyridylmethyl ammonium halide compounds useful for the preparation of 5-(substituted methyl)-2,3-pyridinedicarboxylic acids
    Patent number: 5378843
    Abstract: There are provided 5,6-disubstituted-3-pyridylmethyl ammonium halide compounds, a method for the preparation thereof and the use thereof for the preparation of 5-(substituted methyl)-2,3-pyridinedicarboxylic acids.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: January 3, 1995
    Assignee: American Cyanamid Company
    Inventor: Henry L. Strong
  • Method for the preparation of 2,3-pyridine-dicarboxylic acids and derivatives thereof
    Patent number: 5371229
    Abstract: There is provided an improved process for the preparation of substituted and unsubstituted 2,3-pyridinedicarboxylic acids in significantly enhanced yield by the nitric acid oxidation of the appropriately substituted quinoline precursor in the presence of a catalytic amount of Manganese.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: December 6, 1994
    Assignee: American Cyanamid Company
    Inventors: Nicholas A. Cortese, Jr., Henry L. Strong
  • 5,6-disubstituted-3-pyridylmethyl ammonium halide compounds useful for the preparation of 5- (substituted methyl)-2,3-pyridinedicarboxylic acids
    Patent number: 5288866
    Abstract: There are provided 5,6-disubstituted-3-pyridylmethyl ammonium halide compounds, a method for the preparation thereof and the use thereof for the preparation of 5-(substituted methyl)-2,3-pyridinedicarboxylic acids.
    Type: Grant
    Filed: October 14, 1992
    Date of Patent: February 22, 1994
    Assignee: American Cyanamid Company
    Inventor: Henry L. Strong
  • Substituted-2,3-dicarboxypyridinium nitrates
    Patent number: 5284955
    Abstract: There are provided crystalline substituted-2,3-dicarboxypyridinium nitrate salts, the preparation thereof and the use thereof in the isolation and purification of important substituted pyridinedicarboxylic acid herbicide intermediates.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: February 8, 1994
    Assignee: American Cyanamid Company
    Inventor: Henry L. Strong
  • Process for the manufacture of 2-alkoxymethylacrolein
    Patent number: 5281713
    Abstract: There is provided a process for the manufacture of 2-alkoxymethylacrolein compounds via the reaction of an appropriate alcohol and acrolein in the presence of an acid and a trisubstituted amine to form an intermediate and the subsequent reaction of the intermediate with formaldehyde in the presence of an acid and a disubstituted amine. There is also provided a process for the manufacture of 3-alkoxymethylquinolines from 2-alkoxymethylacrolein.
    Type: Grant
    Filed: October 23, 1992
    Date of Patent: January 25, 1994
    Assignee: American Cyanamid Company
    Inventors: Henry L. Strong, David A. Cortes, Zareen Ahmed
  • Proccess for the manufacture of 2-alkoxymethylacrolein
    Patent number: 5177266
    Abstract: There is provided a process for the manufacture of 2-alkoxymethylacrolein compounds via the reaction of an appropriate alcohol and acrolein in the presence of an acid and a trisubstituted amine to form an intermediate and the subsequent reaction of the intermediate with formaldehyde in the presence of an acid and a disubstituted amine.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: January 5, 1993
    Assignee: American Cyanamid Company
    Inventor: Henry L. Strong
  • Method for the preparation of substituted and unsubstituted 2,3-pyridine and quinolinedicarboxylic acids
    Patent number: 5122608
    Abstract: There is provided a process for the preparation of a substituted or unsubstituted 2,3-pyridine or quinolinedicarboxylic acid by hydrolysis of a substituted or unsubstituted 2,3-pyridine or quinolinedicarboxylic acid diester with an acid having an ionization constant pK.sub.a of less than 3.0 followed by isolation of the product as the free acid or an acid salt.
    Type: Grant
    Filed: December 19, 1990
    Date of Patent: June 16, 1992
    Assignee: American Cyanamid Company
    Inventor: Henry L. Strong
  • Process for preparation 4,5,6,7-tetrahydro-7-oxobenzo-[b]-thiophenes and 1,2,3,4-tetrahydro-4-oxo-1-naphthalenes
    Patent number: 4254268
    Abstract: There is provided an oxidation process using potassium permanganate as oxidizing agent, for the preparation of certain animal growth promoters, namely, N-(4,5,6,7-tetrahydro-7-oxobenzo[b]thien-4-yl)amides, 4,5,6,7-tetrahydro-7-oxobenzo[b]-thien-4-ylureas, N-(1,2,3,4-tetrahydro-4-oxo-1-naphthyl)amides and 1,2,3,4-tetrahydro-4-oxo-1-naphthylureas, said process affording such compounds in markedly improved yields, and being readily suitable for scale-up.
    Type: Grant
    Filed: June 22, 1978
    Date of Patent: March 3, 1981
    Assignee: American Cyanamid Company
    Inventor: Henry L. Strong