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).
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Patent number: 5342958Abstract: 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: GrantFiled: August 11, 1993Date of Patent: August 30, 1994Assignee: Solvay Duphar International Research B.V.Inventors: Kobus Wellinga, Rudolf Mulder
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Patent number: 5245071Abstract: 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: GrantFiled: June 3, 1992Date of Patent: September 14, 1993Assignee: Duphar International Research B.V.Inventors: Kobus Wellinga, Rudolf Mulder
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Patent number: 5142064Abstract: 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: GrantFiled: July 7, 1986Date of Patent: August 25, 1992Assignee: Duphar International Research B.V.Inventors: Kobus Wellinga, Rudolf Mulder
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Patent number: 4927452Abstract: 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: GrantFiled: November 28, 1988Date of Patent: May 22, 1990Assignee: Duphar International Research B.V.Inventors: Kobus Wellinga, Jacobus H. H. Eussen
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Patent number: 4920135Abstract: 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: GrantFiled: February 7, 1989Date of Patent: April 24, 1990Assignee: Duphar International Research B.V.Inventors: Kobus Wellinga, Rudolf Wulder
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Patent number: 4854961Abstract: 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: GrantFiled: October 30, 1987Date of Patent: August 8, 1989Assignee: Duphar International Research B.V.Inventors: Kobus Wellinga, Jacobus H. H. Eussen
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Patent number: 4833151Abstract: 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: GrantFiled: May 28, 1986Date of Patent: May 23, 1989Assignee: Duphar International Research B.V.Inventors: Kobus Wellinga, Rudolf Mulder
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Patent number: 4607044Abstract: 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: GrantFiled: October 30, 1984Date of Patent: August 19, 1986Assignee: Duphar International Research B.V.Inventors: Kobus Wellinga, Rudolf Mulder
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Patent number: 4166124Abstract: New 2,6-dihalobenzoyl urea derivatives and their use as insecticides.Type: GrantFiled: August 25, 1976Date of Patent: August 28, 1979Assignee: U.S. Philips CorporationInventors: Kobus Wellinga, Rudolf Mulder
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Patent number: 4110469Abstract: Benzoyl phenyl urea or thiourea derivatives are used as active substances in insecticidal compositions.Type: GrantFiled: December 29, 1976Date of Patent: August 29, 1978Assignee: U.S. Philips CorporationInventors: Kobus Wellinga, Rudolf Mulder
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Patent number: 4095026Abstract: 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: GrantFiled: August 19, 1976Date of Patent: June 13, 1978Assignee: U.S. Philips CorporationInventors: Rudolf Mulder, Kobus Wellinga
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Patent number: 4013717Abstract: New organic compounds derived from urea or thiourea, insecticidal preparations on the basis of the new substances and methods of producing the substances.Type: GrantFiled: October 23, 1975Date of Patent: March 22, 1977Assignee: U.S. Philips CorporationInventors: Kobus Wellinga, Rudolf Mulder
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Patent number: 4010271Abstract: 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: GrantFiled: May 30, 1975Date of Patent: March 1, 1977Assignee: U.S. Philips CorporationInventors: Rudolf Mulder, Kobus Wellinga
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Patent number: 3991073Abstract: 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: GrantFiled: February 7, 1975Date of Patent: November 9, 1976Assignee: U.S. Philips CorporationInventors: Rudolf Mulder, Kobus Wellinga
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Patent number: 3989842Abstract: Organic compounds derived from urea or thiourea are used as active ingredients in insecticidal compositions.Type: GrantFiled: November 8, 1974Date of Patent: November 2, 1976Assignee: U.S. Philips CorporationInventors: Kobus Wellinga, Rudolf Mulder
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Patent number: 3933908Abstract: New organic compounds derived from urea or thiourea, insecticidal preparations on the basis of the new substances and methods of producing the substances.Type: GrantFiled: April 25, 1973Date of Patent: January 20, 1976Assignee: U.S. Philips CorporationInventors: Kobus Wellinga, Rudolf Mulder