Patents by Inventor Raymond H. Rigterink

Raymond H. Rigterink 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: 5001266
    Abstract: Novel aniline compounds that are useful in preparing N-aroyl N'-phenyl ureas having alkyl substituents in the 2-, 3-, 5- and 6-positions and haloalkoxy in the 4-position of the N'-phenyl which are more active and have a broader spectrum of effectiveness than the known benzoylurea insecticides.
    Type: Grant
    Filed: May 19, 1988
    Date of Patent: March 19, 1991
    Assignee: The Dow Chemical Company
    Inventors: Raymond H. Rigterink, Barat Bisabri-Ershadi
  • Patent number: 4868215
    Abstract: N-aroyl N'-phenyl ureas having the formula ##STR1## wherein: Ar is a substituted phenyl, pyridyl or pyrimidinyl radical wherein the substituents are chloro, bromo, fluoro C.sub.1 -C.sub.3 alkyl or C.sub.1 -C.sub.3 alkoxy, with the proviso that at least one substituent is positioned ortho to the carbonyl group; R.sub.3 and R.sub.4 are individually H or C.sub.1 -C.sub.4 alkyl or together they form the group ##STR2## Y is O or S; X.sub.1, X.sub.2, X.sub.3 and X.sub.4 are individually H, halogen, C.sub.1 -C.sub.3 alkyl, C.sub.1 -C.sub.3 alkoxy, alkylcarbonyl, alkoxycarbonyl, C.sub.1 -C.sub.3 alkylthio, NO.sub.2, CN or NR.sub.5 R.sub.6 wherein R.sub.5 and R.sub.6 are H or C.sub.1 -C.sub.3 alkyl with the provisos that at least one of X.sub.1, X.sub.2, X.sub.3 or X.sub.4 is other than H and (a) when three of X.sub.1, X.sub.2, X.sub.3 or X.sub.4 are H, the fourth substitution cannot be halogen or alkyl, (b) when X.sub.1 and X.sub.3 are H, X.sub.2 and X.sub.4 cannot both be halogen, (c) when X.sub.2 and X.sub.
    Type: Grant
    Filed: September 24, 1984
    Date of Patent: September 19, 1989
    Assignee: The Dow Chemical Company
    Inventors: Barat Bisabri-Ershadi, Raymond H. Rigterink
  • Patent number: 4536341
    Abstract: Dihalo and haloalkyl, haloalkoxy or haloalkylthio-substituted anilines and aniline derivatives, e.g. isocyanates that are useful in the preparation of acyl ureas having insecticidal activity.
    Type: Grant
    Filed: August 3, 1983
    Date of Patent: August 20, 1985
    Assignee: The Dow Chemical Company
    Inventors: Raymond H. Rigterink, Ronald J. Sbragia
  • Patent number: 4518804
    Abstract: Novel N-aroyl N'-phenyl urea compounds having halogen substituents in the 2- and 5-position of the phenyl radical possess exceptional insecticidal activity.
    Type: Grant
    Filed: August 3, 1983
    Date of Patent: May 21, 1985
    Assignee: The Dow Chemical Company
    Inventors: Raymond H. Rigterink, Barat Bisabri-Ershadi
  • Patent number: 4468405
    Abstract: Novel N-aroyl N'-phenyl ureas having halogen substituents in the 3- and 5-positions and haloalkyl, haloalkoxy or haloalkylthio in the 4-position of the N'-phenyl are more active and have a broader spectrum of effectiveness than the known benzoylurea insecticides.
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: August 28, 1984
    Assignee: The Dow Chemical Company
    Inventors: Raymond H. Rigterink, Ronald J. Sbragia
  • Patent number: 4223025
    Abstract: Compounds are prepared which correspond to the formula ##STR1## wherein R represents alkyl of 1 to 4 carbon atoms and R.sup.1 represents OR, amino or mono- or dialkylamino wherein each alkyl group is of 1 to 4 carbon atoms. These compounds have been found to be highly active in the kill and control of soil insects.
    Type: Grant
    Filed: December 1, 1978
    Date of Patent: September 16, 1980
    Assignee: The Dow Chemical Company
    Inventor: Raymond H. Rigterink
  • Patent number: 4170657
    Abstract: Novel alkoxy or alkylthio substituted(((phenyl)amino)carbonyl)-benzamides are disclosed. The compounds of the instant invention are useful as insecticides and can be formulated to provide insecticidal compositions.
    Type: Grant
    Filed: May 13, 1977
    Date of Patent: October 9, 1979
    Assignee: The Dow Chemical Company
    Inventor: Raymond H. Rigterink
  • Patent number: 4148902
    Abstract: Novel substituted ((phenylamino)carbonyl) pyridine carboxamides are disclosed. The compounds of the instant invention are useful as insecticides and can be formulated to provide insecticidal compositions.
    Type: Grant
    Filed: May 13, 1977
    Date of Patent: April 10, 1979
    Assignee: The Dow Chemical Company
    Inventor: Raymond H. Rigterink
  • Patent number: RE32418
    Abstract: Novel alkoxy or alkylthio substituted(((phenyl)amino)carbonyl)-benzamides are disclosed. The compounds of the instant invention are useful as insecticides and can be formulated to provide insecticidal compositions.
    Type: Grant
    Filed: February 10, 1981
    Date of Patent: May 12, 1987
    Assignee: The Dow Chemical Company
    Inventor: Raymond H. Rigterink