Patents by Inventor Jan Rijn Zeevaart

Jan Rijn Zeevaart 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).

  • Publication number: 20230364272
    Abstract: This invention relates to a hydroxamate metalloprotease inhibitor compound for use in a method of diagnosing or treating cancer, inflammatory diseases or Alzheimer's disease. The compound comprises a zinc-chelating N-hydroxamate moiety radiolabeled with a radionuclide. Radiolabeled compounds of the invention may be used in targeted radionuclide therapy wherein a patient is treated with a compound of the invention comprising a diagnostic radionuclide to identify the presence of a cancer or disease, followed by treatment with a compound of the invention comprising a therapeutic radionuclide to treat said cancer or disease.
    Type: Application
    Filed: August 13, 2021
    Publication date: November 16, 2023
    Inventors: Charlot Rosa VANDEVOORDE, Daniel Du Toit ROSSOUW, Denver Thomas HENDRICKS, Jacobus Petrus SLABBERT, Jan Rijn ZEEVAART, Julie Anne BOLCAEN, Roger HUNTER, Shankari NAIR, Virna Drucille LEANER
  • Patent number: 10874753
    Abstract: This invention relates new radiopharmaceutical conjugates for use in improved methods of diagnosis and treatment of cancer. The radiopharmaceutical conjugate comprises, in sequence: a metabolite that targets tumour cells, bound to a chelating agent capable of containing a radionuclide, bound to a linker capable of binding with an EPR agent in vitro or in vivo; or a chelating agent capable of containing a radionuclide, bound to a metabolite that targets tumour cells, bound to a linker capable of binding with an EPR agent in vitro or in vivo. The radiopharmaceutical conjugates of the present invention provide active and passive targeted radio nuclide delivery systems that can help to improve the biodistribution and pharmacological toxicity of the radiopharmaceuticals used for the diagnosis and therapy of cancer.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: December 29, 2020
    Assignees: The South African Nuclear Energy Corporation Limited, University of Cape Town
    Inventors: Cathryn Helena Stanford Driver, Jan Rijn Zeevaart, Mohamed Iqbal Parker, Roger Hunter
  • Publication number: 20200312476
    Abstract: A method of obtaining, from a target compound, a radioisotope of a target element comprised in the target compound includes irradiating the target compound with high energy photon irradiation (gamma irradiation). Thereby the target element radioisotope is formed. The method is performed such that the target element radioisotope is of different oxidation state than the target element, and is comprised in a target element radioisotope compound that is separable from the target compound by a physical and/or chemical separation method.
    Type: Application
    Filed: June 29, 2018
    Publication date: October 1, 2020
    Applicant: The South African Nuclear Energy Corporation SOC Limited
    Inventor: Jan Rijn Zeevaart
  • Patent number: 10363324
    Abstract: This invention relates to a pharmaceutical composition for parenteral or oral administration containing a radioactive compound which can be used diagnostically or therapeutically. The composition comprises a micro-emulsion constituted by a dispersion of vesicles or microsponges of a fatty acid based component in an aqueous or other pharmacologically acceptable carrier in which nitrous oxide is dissolved, the fatty acid based component comprising at least one long chain fatty acid based substance selected from the group consisting of free fatty acids and derivatives of free fatty acids, and the radioactive compound.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: July 30, 2019
    Assignees: The South African Nuclear Energy Corporation Limited, North-West University
    Inventors: Anne Frederica Grobler, Jan Rijn Zeevaart
  • Publication number: 20170296684
    Abstract: This invention relates new radiopharmaceutical conjugates for use in improved methods of diagnosis and treatment of cancer. The radiopharmaceutical conjugate comprises, in sequence: a metabolite that targets tumour cells, bound to a chelating agent capable of containing a radionuclide, bound to a linker capable of binding with an EPR agent in vitro or in vivo; or a chelating agent capable of containing a radionuclide, bound to a metabolite that targets tumour cells, bound to a linker capable of binding with an EPR agent in vitro or in vivo. The radiopharmaceutical conjugates of the present invention provide active and passive targeted radio nuclide delivery systems that can help to improve the biodistribution and pharmacological toxicity of the radiopharmaceuticals used for the diagnosis and therapy of cancer.
    Type: Application
    Filed: September 25, 2015
    Publication date: October 19, 2017
    Inventors: Cathryn Helena Stanford DRIVER, Jan Rijn ZEEVAART, Mohamed Iqbal PARKER, Roger HUNTER
  • Publication number: 20160346412
    Abstract: The present invention relates to a stabilized kit for the preparation of a radiopharmaceutical. In particular, the present invention relates to the use of a non-aqueous solvent for the stabilisation of the ligand component of the kit.
    Type: Application
    Filed: February 6, 2015
    Publication date: December 1, 2016
    Inventors: Jan Rijn Zeevaart, Zoltan Szucs, Judith Wagener
  • Publication number: 20160271279
    Abstract: This invention relates to a pharmaceutical composition for parenteral or oral administration containing a radioactive compound which can be used diagnostically or therapeutically. The composition comprises a micro-emulsion constituted by a dispersion of vesicles or microsponges of a fatty acid based component in an aqueous or other pharmacologically acceptable carrier in which nitrous oxide is dissolved, the fatty acid based component comprising at least one long chain fatty acid based substance selected from the group consisting of free fatty acids and derivatives of free fatty acids, and the radioactive compound.
    Type: Application
    Filed: November 4, 2014
    Publication date: September 22, 2016
    Inventors: Anne Frederica Grobler, Jan Rijn Zeevaart
  • Patent number: 9047998
    Abstract: The invention relates to a method of producing radionuclides. According to the method, a target medium comprising at least a target nuclide material is irradiated in an irradiation zone with neutron irradiation. Radionuclides form in the target nuclide material as a result of the irradiation, and at least some of the formed radionuclides are ejected from the target nuclide material. The ejected radionuclides are then captured and collected in a carbon-based recoil capture material which does not have an empty cage structure at crystallographic level.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: June 2, 2015
    Assignee: The South African Nuclear Energy Corporation Limited
    Inventors: David Randall Jansen, Geert Cornelis Krijger, Zvonimir Ivica Kolar, Jan Rijn Zeevaart
  • Publication number: 20140199240
    Abstract: The invention relates to a method for preparing a bisphosphonate covalently bonded to a nanostructure. This invention also relates to a bisphosphonate having incorporated therein a radioisotope selected from 32p or 33P, preferably 33p, wherein the bisphosphonate is covalently bonded to a nanostructure directly or by way of a linker, and to the use thereof in a method of treating calcific tumours in a patient.
    Type: Application
    Filed: July 2, 2012
    Publication date: July 17, 2014
    Applicants: UNIVERSITY OF JOHANNESBURG, THE SOUTH AFRICAN NUCLEAR ENERGY CORPORATION LIMITED
    Inventors: Jan Rijn Zeevaart, Xavier Yangkou Mbianda, Zoltan Szucs
  • Publication number: 20130170593
    Abstract: The invention relates to a method of producing radionuclides. According to the method, a target medium comprising at least a target nuclide material is irradiated in an irradiation zone with neutron irradiation. Radionuclides form in the target nuclide material as a result of the irradiation, and at least some of the formed radionuclides are ejected from the target nuclide material. The ejected radionuclides are then captured and collected in a carbon-based recoil capture material which does not have an empty cage structure at crystallographic level.
    Type: Application
    Filed: March 10, 2011
    Publication date: July 4, 2013
    Applicant: The South African Nuclear Energy Corporation Ltd.
    Inventors: David Randall Jansen, Geert Cornelis Krijger, Zvonimir Ivica Kolar, Jan Rijn Zeevaart