Patents by Inventor Dat P. Le

Dat P. Le 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).

  • Patent number: 5530028
    Abstract: Insecticidal compounds having the formula N-(2-R.sup.a -3-R.sup.b -4-R.sup.h -benzoyl)-N'-(2-R.sup.c -3-R.sup.d -4-R.sup.e -5-R.sup.f -benzoyl)-N'-R.sup.g -hydrazine wherein R.sup.a is a halo or lower alkyl; R.sup. b is lower alkoxy, optionally substituted with halo (preferably fluoro); R.sup.c is selected from hydrogen, halo, lower alkyl, lower alkoxy, lower alkoxy lower alkyl, and nitro; R.sup.d, R.sup.e and R.sup.f are each independently selected from hydrogen, bromo, chloro, fluoro, lower alkyl, lower alkoxy, and lower alkoxy lower alkyl; R.sub.g is a (C.sub.4 -C.sub.6)alkyl; R.sup.h is hydrogen, lower alkoxy, lower alkyl, or when taken together with R.sup.b is methylenedioxy (--OCH.sub.2 O--), 1,2-ethylenedioxy (--OCH.sub.2 CH.sub.2 O--), 1,2-ethyleneoxy (--CH.sub.2 CH.sub.2 O--) or 1,3-propyleneoxy (--CH.sub.2 CH.sub.2 CH.sub.2 O--) wherein an oxo atom is located at the R.sup.b position; and the substituents R.sup.c and R.sup.d, or R.sup.d and R.sup.e, or R.sup.e and R.sup.
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: June 25, 1996
    Assignee: Rohm and Haas Company
    Inventors: Zev Lidert, Dat P. Le, Robert E. Hormann, Thomas R. Opie
  • Patent number: 5354762
    Abstract: This invention relates to insecticidal compositions containing six-membered heterocyclic derivatives of N'-substituted-N,N'-diacylhydrazines, methods of using such compositions and novel six-membered heterocyclic derivatives of N'-substituted-N,N'-diacylhydrazines.
    Type: Grant
    Filed: February 19, 1987
    Date of Patent: October 11, 1994
    Assignee: Rohm and Haas Company
    Inventors: Adam C. Hsu, Dat P. Le
  • Patent number: 5344958
    Abstract: Insecticidal compounds having the formula N-(2-R.sup.a -3-R.sup.b -benzoyl)-N'-(2-R.sup.c -3-R.sup.d -4-R.sup.e -5-R.sup.f -benzoyl)-N'-R.sup.g -hydrazine, where R.sup.a is a halogen or a lower alkyl; R.sup.b is lower alkoxy; R.sup.c-f are selected from hydrogen, bromo, chloro, fluoro, lower alkyl and lower alkoxy; and Rg is a (C.sub.4 -C.sub.6)alkyl or (C.sub.4 -C.sub.6)alkenyl; as well as compositions comprising an agronomically acceptable carrier and an insecticidally effective amount of such compounds; and methods of using such compounds and compositions.Also, methods for the production of the compounds and their intermediates, which methods comprise admixing a 3-amino-2-(substituted)-benzoic acid, sodium nitrite and methanol under acidic conditions.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: September 6, 1994
    Assignee: Rohm and Haas Company
    Inventors: Zev Lidert, Dat P. Le
  • Patent number: 5117057
    Abstract: This invention relates to insecticidal compositions containing N'-substituted-N,N'-disubstitutedhydrazines, methods of using such compositions and N'-substituted-N, N'-disubstitutedhydrazines. Specifically, the invention relates to insect growth regulating compositions, and methods of using such compositions, which include compounds having a nucleus of the formula ##STR1## where A', B', D and J are independently any atom or group of atoms; where E is a tertiary carbon containing organic radical, a haloalkyl having a total of at least four carbon and halogen atoms but not more than six halogen atoms, or a non-tertiary carbon containing non-haloalkyl organic or organometallic radical having at least five atoms other than hydrogen, oxygen and halogen, and is attached to the nitrogen shown in the formula by a carbon-to-nitrogen single bond; where one G.sub.1 is C, N, O and S, and both G.sub.2 's and the other G.sub.1 are carbon; or one G.sub.2 is S or P, and both G.sub.1 's and the other G.sub.
    Type: Grant
    Filed: June 14, 1991
    Date of Patent: May 26, 1992
    Assignee: Rohm and Haas Company
    Inventors: Adam C. Hsu, Harold E. Aller, Raymond A. Murphy, Dat P. Le, Donald W. Hamp, Barry Weinstein
  • Patent number: 5075471
    Abstract: Insecticidal compounds of the formula ##STR1## wherein one of A or B is ferrocenyl and the other of A or B is phenyl or substituted phenyl and R is branched alkyl are effective in controlling the Southern Armyworm and Mexican Bean Beetle.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: December 24, 1991
    Assignee: Rohm and Haas Company
    Inventors: Enrique L. Michelotti, Dat P. Le, Glenn R. Carlson, Anne R. Egan
  • Patent number: 4696938
    Abstract: This invention relates to novel insecticidal 6-aryl-pyridine-thiosemicarbazones, compositions containing those compounds, methods of using said compounds and compositions.
    Type: Grant
    Filed: April 25, 1986
    Date of Patent: September 29, 1987
    Assignee: Rohm and Haas Company
    Inventor: Dat P. Le