Patents by Inventor Ronald Christiaan Elgersma

Ronald Christiaan Elgersma 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: 20230144211
    Abstract: The present invention relates to novel antifolate linker-drugs, conjugates comprising such antifolate linker-drugs, and the use thereof in the treatment of diseases, such as cancer, autoimmune and infectious diseases, optionally in combination with other therapeutic agents.
    Type: Application
    Filed: December 22, 2022
    Publication date: May 11, 2023
    Inventors: Ronald Christiaan ELGERSMA, Tijl HUIJBREGTS, Dennis Christian Johannes WAALBOER, Johannes Albertus Frederikus JOOSTEN, Christina Adriana BEUCKENS-SCHORTINGHUIS
  • Patent number: 11419944
    Abstract: The present invention relates to linker-drug compounds (LDs) and antibody-drug conjugates (ADCs) comprising a non-linear self-immolative linker, which is cleavable or transformable under appropriate conditions and which reduces the hydrophobicity of the antibody-drug conjugate.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: August 23, 2022
    Assignee: Byondis B.V.
    Inventors: Ronald Christiaan Elgersma, Tijl Huijbregts, Rudy Gerardus Elisabeth Coumans
  • Publication number: 20220119392
    Abstract: The present invention relates to novel antifolate linker-drugs, conjugates comprising such antifolate linker-drugs, and the use thereof in the treatment of diseases, such as cancer, autoimmune and infectious diseases, optionally in combination with other therapeutic agents.
    Type: Application
    Filed: December 30, 2021
    Publication date: April 21, 2022
    Inventors: Ronald Christiaan ELGERSMA, Tijl HUIJBREGTS, Dennis Christian Johannes WAALBOER, Johannes Albertus Frederikus JOOSTEN, Christina Adriana BEUCKENS-SCHORTINGHUIS
  • Patent number: 11052155
    Abstract: This invention relates to novel analogs of the DNA-alkylating agent CC-1065 and to their conjugates. Furthermore this invention concerns intermediates for the preparation of said agents and conjugates. The conjugates are designed to release their (multiple) payload after one or more activation steps and/or at a rate and time span controlled by the conjugate in order to selectively deliver and/or controllably release one or more of said DNA alkylating agents. The agents, conjugates, and intermediates can be used to treat an illness that is characterized by undesired (cell) proliferation. As an example, the agents and the conjugates of this invention may be used to treat a tumor.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: July 6, 2021
    Assignee: SYNTARGA BV
    Inventors: Patrick Henry Beusker, Rudy Gerardus Elisabeth Coumans, Ronald Christiaan Elgersma, Wiro Michael Petrus Bernardus Menge, Johannes Albertus Frederikus Joosten, Henri Johannes Spijker, Franciscus Marinus Hendrikus De Groot
  • Publication number: 20200297859
    Abstract: The present invention relates to linker-drug compounds (LDs) and antibody-drug conjugates (ADCs) comprising a non-linear self-immolative linker, which is cleavable or transformable under appropriate conditions and which reduces the hydrophobicity of the antibody-drug conjugate.
    Type: Application
    Filed: October 11, 2017
    Publication date: September 24, 2020
    Inventors: Ronald Christiaan ELGERSMA, Tijl HUIJBREGTS, Rudy Gerardus Elisabeth COUMANS
  • Publication number: 20180147289
    Abstract: This invention relates to novel analogs of the DNA-alkylating agent CC-1065 and to their conjugates. Furthermore this invention concerns intermediates for the preparation of said agents and conjugates. The conjugates are designed to release their (multiple) payload after one or more activation steps and/or at a rate and time span controlled by the conjugate in order to selectively deliver and/or controllably release one or more of said DNA alkylating agents. The agents, conjugates, and intermediates can be used to treat an illness that is characterized by undesired (cell) proliferation. As an example, the agents and the conjugates of this invention may be used to treat a tumor.
    Type: Application
    Filed: March 17, 2017
    Publication date: May 31, 2018
    Applicant: SYNTARGA BV
    Inventors: Patrick Henry BEUSKER, Rudy Gerardus Elisabeth Coumans, Ronald Christiaan Elgersma, Wiro Michael Petrus Bernardus Menge, Johannes Albertus Frederikus Joosten, Henri Johannes Spijker, Franciscus Marinus Hendrikus De Groot
  • Publication number: 20180133316
    Abstract: This invention relates to novel analogs of the DNA-alkylating agent CC-1065 and to their conjugates. Furthermore this invention concerns intermediates for the preparation of said agents and conjugates. The conjugates are designed to release their (multiple) payload after one or more activation steps and/or at a rate and time span controlled by the conjugate in order to selectively deliver and/or controllably release one or more of said DNA alkylating agents. The agents, conjugates, and intermediates can be used to treat an illness that is characterized by undesired (cell) proliferation. As an example, the agents and the conjugates of this invention may be used to treat a tumor.
    Type: Application
    Filed: March 17, 2017
    Publication date: May 17, 2018
    Applicant: SYNTARGA BV
    Inventors: Patrick Henry BEUSKER, Rudy Gerardus Elisabeth COUMANS, Ronald Christiaan ELGERSMA, Wiro Michael Petrus Bernardus MENGE, Johannes Albertus Frederikus JOOSTEN, Henri Johannes SPIJKER, Franciscus Marinus Hendrikus DE GROOT
  • Patent number: 9890159
    Abstract: The present invention relates to a process comprising converting a compound of formula (I) into a compound of formula (II) by reaction with an organolithium reagent, which compound can be further converted into duocarmycin analogs consisting of a DNA-alkylating and a DNA-binding part, and still further into corresponding antibody-drug conjugates.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: February 13, 2018
    Assignee: Synthon Biopharmaceuticals B.V.
    Inventors: Tijl Huijbregts, Ronald Christiaan Elgersma, Patrick Henry Beusker, Johannes Albertus Frederikus Joosten, Rudy Gerardus Elisabeth Coumans, Henri Johannes Spijker, Wiro Menge, Franciscus Marinus Hendrikus De Groot
  • Publication number: 20170333567
    Abstract: This invention relates to novel analogs of the DNA-alkylating agent CC-1065 and to their conjugates. Furthermore this invention concerns intermediates for the preparation of said agents and conjugates. The conjugates are designed to release their (multiple) payload after one or more activation steps and/or at a rate and time span controlled by the conjugate in order to selectively deliver and/or controllably release one or more of said DNA alkylating agents. The agents, conjugates, and intermediates can be used to treat an illness that is characterized by undesired (cell) proliferation. As an example, the agents and the conjugates of this invention may be used to treat a tumor.
    Type: Application
    Filed: March 17, 2017
    Publication date: November 23, 2017
    Applicant: SYNTARGA BV
    Inventors: Patrick Henry BEUSKER, Rudy Gerardus Elisabeth Coumans, Ronald Christiaan Elgersma, Wiro Michael Petrus Bernardus Menge, Johannes Albertus Frederikus Joosten, Henri Johannes Spijker, Franciscus Marinus Hendrikus De Groot
  • Patent number: 9815784
    Abstract: This invention relates to novel analogs of the DNA-alkylating agent CC-1065 and to their conjugates. Furthermore this invention concerns intermediates for the preparation of said agents and conjugates. The conjugates are designed to release their (multiple) payload after one or more activation steps and/or at a rate and time span controlled by the conjugate in order to selectively deliver and/or controllably release one or more of said DNA alkylating agents. The agents, conjugates, and intermediates can be used to treat an illness that is characterized by undesired (cell) proliferation. As an example, the agents and the conjugates of this invention may be used to treat a tumor.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: November 14, 2017
    Assignee: Syntarga B.V.
    Inventors: Patrick Henry Beusker, Rudy Gerardus Elisabeth Coumans, Ronald Christiaan Elgersma, Wiro Michael Petrus Bernardus Menge, Johannes Albertus Frederikus Joosten, Henri Johannes Spijker, Franciscus Marinus Hendrikus de Groot
  • Publication number: 20170274090
    Abstract: This invention relates to novel analogs of the DNA-alkylating agent CC-1065 and to their conjugates. Furthermore this invention concerns intermediates for the preparation of said agents and conjugates. The conjugates are designed to release their (multiple) payload after one or more activation steps and/or at a rate and time span controlled by the conjugate in order to selectively deliver and/or controllably release one or more of said DNA alkylating agents. The agents, conjugates, and intermediates can be used to treat an illness that is characterized by undesired (cell) proliferation. As an example, the agents and the conjugates of this invention may be used to treat a tumor.
    Type: Application
    Filed: March 17, 2017
    Publication date: September 28, 2017
    Applicant: SYNTARGA BV
    Inventors: Patrick Henry BEUSKER, Rudy Gerardus Elisabeth COUMANS, Ronald Christiaan ELGERSMA, Wiro Michael Petrus Bernardus MENGE, Johannes Albertus Frederikus JOOSTEN, Henri Johannes SPIJKER, Franciscus Marinus Hendrikus DE GROOT
  • Publication number: 20170145006
    Abstract: The present invention relates to a process comprising converting a compound of formula (I) into a compound of formula (II) by reaction with an organolithium reagent, which compound can be further converted into duocarmycin analogues consisting of a DNA-alkylating and a DNA-binding part, and still further into corresponding antibody-drug conjugates.
    Type: Application
    Filed: June 5, 2014
    Publication date: May 25, 2017
    Applicant: SYNTHON BIOPHARMACEUTICALS B.V.
    Inventors: Tijl HUIJBREGTS, Ronald Christiaan ELGERSMA, Patrick Henry BEUSKER, Johannes Albertus Frederikus JOOSTEN, Rudy Gerardus Elisabeth COUMANS, Henri Johannes SPIJKER, Wiro MENGE, Franciscus Marinus Hendrikus DE GROOT
  • Patent number: 9629924
    Abstract: This invention relates to novel analogs of the DNA-alkylating agent CC-1065 and to their conjugates. Furthermore this invention concerns intermediates for the preparation of said agents and conjugates. The conjugates are designed to release their (multiple) payload after one or more activation steps and/or at a rate and time span controlled by the conjugate in order to selectively deliver and/or controllably release one or more of said DNA alkylating agents. The agents, conjugates, and intermediates can be used to treat an illness that is characterized by undesired (cell) proliferation. As an example, the agents and the conjugates of this invention may be used to treat a tumor.
    Type: Grant
    Filed: April 21, 2011
    Date of Patent: April 25, 2017
    Assignee: Syntarga BV
    Inventors: Patrick Henry Beusker, Rudy Gerardus Elisabeth Coumans, Ronald Christiaan Elgersma, Wiro Michael Petrus Bernardus Menge, Johannes Albertus Frederikus Joosten, Henri Johannes Spijker, Franciscus Marinus Hendrikus De Groot
  • Publication number: 20160052880
    Abstract: This invention relates to novel analogs of the DNA-alkylating agent CC-1065 and to their conjugates. Furthermore this invention concerns intermediates for the preparation of said agents and conjugates. The conjugates are designed to release their (multiple) payload after one or more activation steps and/or at a rate and time span controlled by the conjugate in order to selectively deliver and/or controllably release one or more of said DNA alkylating agents. The agents, conjugates, and intermediates can be used to treat an illness that is characterized by undesired (cell) proliferation. As an example, the agents and the conjugates of this invention may be used to treat a tumor.
    Type: Application
    Filed: October 28, 2014
    Publication date: February 25, 2016
    Applicant: Syntarga BV
    Inventors: Patrick Henry Beusker, Rudy Gerardus Elisabeth Coumans, Ronald Christiaan Elgersma, Wiro Michael Petrus Bernardus Menge, Johannes Albertus Frederikus Joosten, Henri Johannes Spijker, Franciscus Marinus Hendrikus de Groot
  • Patent number: 8889868
    Abstract: This invention relates to novel analogs of the DNA-alkylating agent CC-1065 and to their conjugates. Furthermore this invention concerns intermediates for the preparation of said agents and conjugates. The conjugates are designed to release their (multiple) payload after one or more activation steps and/or at a rate and time span controlled by the conjugate in order to selectively deliver and/or controllably release one or more of said DNA alkylating agents. The agents, conjugates, and intermediates can be used to treat an illness that is characterized by undesired (cell) proliferation. As an example, the agents and the conjugates of this invention may be used to treat a tumor.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: November 18, 2014
    Assignee: Syntarga BV
    Inventors: Patrick Henry Beusker, Rudy Gerardus Elisabeth Coumans, Ronald Christiaan Elgersma, Wiro Michaƫl Petrus Bernardus Menge, Johannes Albertus Frederikus Joosten, Henri Johannes Spijker, Franciscus Marinus Hendrikus de Groot
  • Publication number: 20130224227
    Abstract: This invention relates to novel analogs of the DNA-alkylating agent CC-1065 and to their conjugates. Furthermore this invention concerns intermediates for the preparation of said agents and conjugates. The conjugates are designed to release their (multiple) payload after one or more activation steps and/or at a rate and time span controlled by the conjugate in order to selectively deliver and/or controllably release one or more of said DNA alkylating agents. The agents, conjugates, and intermediates can be used to treat an illness that is characterized by undesired (cell) proliferation. As an example, the agents and the conjugates of this invention may be used to treat a tumor.
    Type: Application
    Filed: April 21, 2011
    Publication date: August 29, 2013
    Inventors: Patrick Henry Beusker, Rudy Gerardus Elisabeth Coumans, Ronald Christiaan Elgersma, Wiro Michael Petrus Bernardus Menge, Johannes Albertus Frederikus Joosten, Henri Johannes Spijker, Franciscus Marinus Hendrikus de Groot