Patents by Inventor Kobus Wellinga

Kobus Wellinga 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: 5342958
    Abstract: Compounds of the formula ##STR1## wherein A is a hydrogen atoms, a halogen atom, a methyl group, or a methoxy group;B is a hydrogen atom, a halogen atom, a methyl group, or a methoxy group, with the proviso that A and B ar not both a hydrogen atom;X and Y each are an oxygen atom or a sulfur atom;R is a hydrogen atom, an alkyl group, a hydroxy group, an alkoxy group, an alkoxymethyl group, an acyl group, or an alkoxycarbonyl group;R.sub.1 is a hydrogen atom, an alkyl group, a halogen substituted alkyl group, an alkoxy substituted alkyl group, an alkylthio substituted alkyl group, a cyano substituted alkyl group, a 1-cycloalkenyl group, a benzyl group, a halogen substituted benzyl group, a hydroxy group, an alkoxy group, an acyl group, an alkoxycarbonyl group, an alkoxythiocarbonyl group, an alkylsulfonyl group, or a phenylsulfonyl group, while furthermore R and R.sub.1 together with the group ##STR2## indicated in the above formula may form a ring system; and R.sub.
    Type: Grant
    Filed: August 11, 1993
    Date of Patent: August 30, 1994
    Assignee: Solvay Duphar International Research B.V.
    Inventors: Kobus Wellinga, Rudolf Mulder
  • Patent number: 5245071
    Abstract: Compounds of the formula ##STR1## wherein A is a hydrogen atom, a halogen atom, a methyl group, or a methoxy group;B is a hydrogen atom, a halogen atom, a methyl group, or a methoxy group, with the proviso that A and B ar not both a hydrogen atom;X and Y each are an oxygen atom or a sulfur atom;R is a hydrogen atom, an alkyl group, a hydroxy group, an alkoxy group, an alkoxymethyl group, an acyl group, or an alkoxycarbonyl group;R.sub.1 is a hydrogen atom, an alkyl group, a halogen substituted alkyl group, an alkoxy substituted alkyl group, an alkylthio substituted alkyl group, a cyano substituted alkyl group, a 1-cycloalkenyl group, a benzyl group, a halogen substituted benzyl group, a hydroxy group, an alkoxy group, an acyl group, an alkoxycarbonyl group, an alkoxythiocarbonyl group, an alkylsulfonyl group, or a phenylsulfonyl group, while furthermore R and R.sub.1 together with the group ##STR2## indicated in the above formula may form a ring system; and R.sub.
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: September 14, 1993
    Assignee: Duphar International Research B.V.
    Inventors: Kobus Wellinga, Rudolf Mulder
  • Patent number: 5142064
    Abstract: Compounds of the formula ##STR1## wherein A is a hydrogen atom, a halogen atom, a methyl group, or a methoxy group;B is a hydrogen atom, a halogen atom, a methyl group, or a methoxy group, with the proviso that A and B ar not both a hydrogen atom;X and Y each are an oxygen atom or a sulfur atom;R is a hydrogen atom, an alkyl group, a hydroxy group, an alkoxy group, an alkoxymethyl group, an acyl group, or an alkoxycarbonyl group;R.sub.1 is a hydrogen atom, an alkyl group, a halogen substituted alkyl group, an alkoxy substituted alkyl group, an alkylthio substituted alkyl group, a cyano substituted alkyl group, a 1-cycloalkenyl group, a benzyl group, a halogen substituted benzyl group, a hydroxy group, an alkoxy group, an acyl group, an alkoxycarbonyl group, an alkoxythiocarbonyl group, an alkylsulfonyl group, or a phenylsulfonyl group, while furthermore R and R.sub.1 together with the group ##STR2## indicated in the above formula may form a ring system; and R.sub.
    Type: Grant
    Filed: July 7, 1986
    Date of Patent: August 25, 1992
    Assignee: Duphar International Research B.V.
    Inventors: Kobus Wellinga, Rudolf Mulder
  • Patent number: 4927452
    Abstract: The invention relates to a herbicidally active compound of the general ##STR1## wherein R.sub.1, R.sub.2 R.sub.3 and R.sub.4 are equal or different and represent hydrogen atoms, alkyl groups having 1-6 carbon atoms, cycloalkyl groups having 3-6 carbon atoms or alkoxycarbonyl groups having 2-5 carbon atoms;R.sub.5 is a hydrogen atom, an alkyl group or haloalkyl group having 1-8 carbon atoms, a substituted or non-substituted phenyl group, a substituted or non-substituted heterocyclic group, or an alkenyl, alkynyl or alkoxycarbonyl group having 2-5 carbon atoms;and wherein two of the groups R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 together may form a straight or branched alkylene group having 3-5 carbon atoms;Ar is a phenyl group, a phenyl (C.sub.1 -C.sub.4)alkyl group or a heteroaryl group;R.sub.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: May 22, 1990
    Assignee: Duphar International Research B.V.
    Inventors: Kobus Wellinga, Jacobus H. H. Eussen
  • Patent number: 4920135
    Abstract: Certain organic compounds derived from urea or thiourea having insecticidal activity and methods of their preparation are disclosed. The compounds according to the invention have been found to interfere with the mechanism of metamorphoses which occurs in insects. Hence, the substances according to the invention are specifically active against insects. Owing to this specificity and because of the absence of phytotoxicity effects, the compounds of this invention are of prime importance.
    Type: Grant
    Filed: February 7, 1989
    Date of Patent: April 24, 1990
    Assignee: Duphar International Research B.V.
    Inventors: Kobus Wellinga, Rudolf Wulder
  • Patent number: 4854961
    Abstract: The invention relates to a herbicidally and/or algicidally active compound of the general formula ##STR1## wherein R.sub.1 is a substituted or non-substituted alkyl group having 1-6 carbon atoms, or an alkenyl or alkynyl group having 2-6 carbon atoms;R.sub.2 is a halogen atom; a nitro group; a cyano group; a substituted or non-substituted benzyl, phenyl, phenoxy, phenylthio, phenylsulphinyl, phenylsulphonyl or phenylsulphonyloxy group; or a halogenated or non-halogenated alkyl, alkoxy, alkylthio, alkylsulphinyl, alkylsulphonyl or alkylsulphonyloxy group having 1-4 carbon atoms;R.sub.3 is a hydrogen atom, a halogen atom, or an alkyl group having 1-4 carbon atoms; andX is O or S;or a salt of this compound with an organic or inorganic acid.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: August 8, 1989
    Assignee: Duphar International Research B.V.
    Inventors: Kobus Wellinga, Jacobus H. H. Eussen
  • Patent number: 4833151
    Abstract: Certain organic compounds derived from urea or thio-urea having insectical activity and methods of their preparation are disclosed. The compounds according to the invention have been found to interfere with the mechanism of metamorphoses which occurs in insects. Hence, the substances according to the invention are specifically active against insects. Owing to this specificity and because of the absence of phytotoxicity effects, the compounds of this invention are of prime importance.
    Type: Grant
    Filed: May 28, 1986
    Date of Patent: May 23, 1989
    Assignee: Duphar International Research B.V.
    Inventors: Kobus Wellinga, Rudolf Mulder
  • Patent number: 4607044
    Abstract: Certain organic compounds derived from urea or thiourea having insectical activity and methods of their preparation are disclosed. The compounds according to the invention have been found to interfere with the mechanism of metamorphoses which occurs in insects. Hence the substances according to the invention are specifically active against insects. Owing to this specificity and because of the absence of phytotoxicity effects, the compounds of this invention are of prime importance.
    Type: Grant
    Filed: October 30, 1984
    Date of Patent: August 19, 1986
    Assignee: Duphar International Research B.V.
    Inventors: Kobus Wellinga, Rudolf Mulder
  • Patent number: 4166124
    Abstract: New 2,6-dihalobenzoyl urea derivatives and their use as insecticides.
    Type: Grant
    Filed: August 25, 1976
    Date of Patent: August 28, 1979
    Assignee: U.S. Philips Corporation
    Inventors: Kobus Wellinga, Rudolf Mulder
  • Patent number: 4110469
    Abstract: Benzoyl phenyl urea or thiourea derivatives are used as active substances in insecticidal compositions.
    Type: Grant
    Filed: December 29, 1976
    Date of Patent: August 29, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Kobus Wellinga, Rudolf Mulder
  • Patent number: 4095026
    Abstract: It has been found that novel pyrazoline compounds have a strong and specific biocidal activity against arthropods and especially insects. In addition to their more direct biocidal activity the novel compounds influence the pattern of motion of arthropods, which results in uncoordinated movements. A highly active substance is, for example, 1-(4-chlorophenylcarbamoyl)-3-(4-chlorophenyl)-5-(4-isopropoxyphenyl)-.DEL TA..sup.2 -pyrazoline. After the substances have been worked up into preparations they can be used for controlling arthropods and especially insects which are pests in agriculture and horticulture and in industrial products.
    Type: Grant
    Filed: August 19, 1976
    Date of Patent: June 13, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Rudolf Mulder, Kobus Wellinga
  • Patent number: 4013717
    Abstract: New organic compounds derived from urea or thiourea, insecticidal preparations on the basis of the new substances and methods of producing the substances.
    Type: Grant
    Filed: October 23, 1975
    Date of Patent: March 22, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Kobus Wellinga, Rudolf Mulder
  • Patent number: 4010271
    Abstract: It has been found that novel pyrazoline compounds have a strong and specific biocidal activity against arthropods and especially insects. In addition to their more direct biocidal activity the novel compounds influence the pattern of motion of arthropods, which results in uncoordinated movements. A highly active substance is, for example, 1-(4-chlorophenylcarbamoyl)-3-(4-chlorophenyl)-5-(4-isopropoxyphenyl)-.DEL TA..sup.2 -pyrazoline. After the substances have been worked up into preparations they can be used for controlling arthropods and especially insects which are pests in agriculture and horticulture and in industrial products.
    Type: Grant
    Filed: May 30, 1975
    Date of Patent: March 1, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Rudolf Mulder, Kobus Wellinga
  • Patent number: 3991073
    Abstract: It has been found that novel pyrazoline compounds have a strong and specific biocidal activity against arthropods and especially insects. In addition to their more direct biocidal activity the novel compounds influence the pattern of motion of arthropods, which results in uncoordinated movements. A highly active substance is, for example, 1-(4-chlorophenylcarbamoyl)-3-(4-chlorophenyl)-5-(4-isopropoxyphenyl)-.DEL TA..sup.2 -pyrazoline. After the substances have been worked up into preparations they can be used for controlling arthropods and especially insects which are pests in agriculture and horticulture and in industrial products.
    Type: Grant
    Filed: February 7, 1975
    Date of Patent: November 9, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Rudolf Mulder, Kobus Wellinga
  • Patent number: 3989842
    Abstract: Organic compounds derived from urea or thiourea are used as active ingredients in insecticidal compositions.
    Type: Grant
    Filed: November 8, 1974
    Date of Patent: November 2, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Kobus Wellinga, Rudolf Mulder
  • Patent number: 3933908
    Abstract: New organic compounds derived from urea or thiourea, insecticidal preparations on the basis of the new substances and methods of producing the substances.
    Type: Grant
    Filed: April 25, 1973
    Date of Patent: January 20, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Kobus Wellinga, Rudolf Mulder