Patents by Inventor Durk Dijkstra

Durk Dijkstra 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: 20080145417
    Abstract: An efficient pharmaceutical formulation for the treatment of an affliction selected from the group consisting of Parkinson's disease, restless legs syndrome and erectile dysfunction. Said composition comprises at least one member selected from the group consisting of apomorphine, 6aR-(?)-N-propyl-norapomorphine and their derivatives and pro-drugs thereof in the form of the base or the pharmaceutically acceptable salts or solvates thereof as an active ingredient in a pharmaceutical preparation suited for oral or intraduodenal administration.
    Type: Application
    Filed: February 19, 2008
    Publication date: June 19, 2008
    Applicant: AXON BIOCHEMICALS B.V.
    Inventors: Hakan Wikstrom, Durk Dijkstra, Thomas Ivo Franciscus Hubert Cremers
  • Publication number: 20080119504
    Abstract: New aporphine derivatives are disclosed which have formula (I) and the physiologically acceptable salts thereof. Said derivatives may be used for the treatment of Parkinson's disease, hemicrania, restless legs syndrome (RLS), sexual dysfunction in men and women, hyperprolactemia and psychotic disorders, and/or evaluation of Parkinson's disease. Processes for the preparation of such derivates are also disclosed.
    Type: Application
    Filed: January 29, 2008
    Publication date: May 22, 2008
    Applicant: AXON BIOCHEMICALS B.V.
    Inventors: Hakan WIKSTROM, Durk Dijkstra, Thomas Cremers, Per Andren, Sandrine Marchais, Ulrik Jurva
  • Patent number: 7332503
    Abstract: New aporphine derivatives are disclosed which have formula (I) and the physiologically acceptable salts thereof. Said derivatives may be used for the treatment of Parkinson's disease, hemicrania, restless legs syndrome (RLS), sexual dysfunction in men and women, hyperprolactemia and psychotic disorders, and/or evaluation of Parkinson's disease. Processes for the preparation of such derivatives are also disclosed.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: February 19, 2008
    Assignee: Axon Biochemicals B.V.
    Inventors: Hakan Wikstrom, Durk Dijkstra, Thomas Cremers, Per Erik Andren, Sandrine Marchais, Ulrik Jurva
  • Patent number: 7238705
    Abstract: New aporphine derivatives are disclosed which have formula (I) and the physiologically acceptable salts thereof. Said derivatives may be used for the treatment of Parkinson's disease, hemicrania, restless legs syndrome (RLS), sexual dysfunction in men and women, hyperprolactemia and psychotic disorders, and/or evaluation of Parkinson's disease. Processes for the preparation of such derivatives are also disclosed.
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: July 3, 2007
    Assignee: Axon Biochemicals B.V.
    Inventors: Hakan Wikstrom, Durk Dijkstra, Thomas Cremers, Per Erik Andren, Sandrine Marchais, Ulrik Jurva
  • Patent number: 7220754
    Abstract: Mono-ester and asymmetrically substituted diesters of dihydrexidine, dinapsoline and A-86929 and substituted derivatives thereof are described. The novel ester/diester derivatives exhibit improved pharmacokinetic characteristics relative to their unesterified parent compounds and can be formulated into pharmaceutical compositions useful for the treatment of a wide variety of dopamine related disorders.
    Type: Grant
    Filed: February 14, 2003
    Date of Patent: May 22, 2007
    Assignee: DarPharma, Inc.
    Inventors: Durk Dijkstra, Hakan Wikstrom
  • Patent number: 6998405
    Abstract: Compounds of the general formula I wherein rings B, C, D and E may be present or not and, when present, are combined with A as A+C, A+E, A+B+C, A+B+D, A+B+E, A+C+E, A+B+C+D or A+B+C+D+E, rings B, C and E being aliphatic whereas ring D may be aliphatic or aromatic/heteroaromatic, and wherein X is —(CH2)m—, in which m is an integer 1–3, to form a ring E or, when E is absent, a group R1 bound to the nitrogen atom, wherein R1 is selected from the group consisting of a hydrogen atom, alkyl or haloalkyl groups of 1 to 3 carbon atoms, cycloalkyl(alkyl) groups of 3 to 5 carbon atoms (i.e.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: February 14, 2006
    Assignee: H. Lundbeck A/S
    Inventors: Håkan Wikström, Durk Dijkstra, Bastiaan Johan Venhuis
  • Publication number: 20050143408
    Abstract: New aporphine derivatives are disclosed which have formula (I) and the physiologically acceptable salts thereof. Said derivatives may be used for the treatment of Parkinson's disease, hemicrania, restless legs syndrome (RLS), sexual dysfunction in men and women, hyperprolactemia and psychotic disorders, and/or evaluation of Parkinson's disease. Processes for the preparation of such derivatives are also disclosed.
    Type: Application
    Filed: February 22, 2005
    Publication date: June 30, 2005
    Applicant: AXON BIOCHEMICALS B.V.
    Inventors: Hakan Wikstrom, Durk Dijkstra, Thomas Cremers, Per Andren, Sandrine Marchais, Ulrik Jurva
  • Publication number: 20050096469
    Abstract: Mono-ester and asymmetrically substituted diesters of dihydrexidine, dinapsoline and A-86929 and substituted derivatives thereof are described. The novel ester/diester derivatives exhibit improved pharmacokinetic characteristics relative to their unesterified parent compounds and can be formulated into pharmaceutical compositions useful for the treatment of a wide variety of dopamine related disorders.
    Type: Application
    Filed: February 14, 2003
    Publication date: May 5, 2005
    Inventors: Durk Dijkstra, Hakan Wikstrom
  • Publication number: 20040220205
    Abstract: An efficient pharmaceutical formulation for the treatment of an affliction selected from the group consisting of Parkin-son's disease, restless legs syndrome, male erectile dysfunc-tion and female sexual dysfunction is disclosed. Said composition comprises at least one member selected from the group consisting of apomorphine, 6aR-(-)-N-propyl-norapomorphine and their derivatives and pro-drugs thereof in the form of the base or the pharmaceutically acceptable salts or solvates thereof as an active ingredient in a pharmaceutical prepara-tion suited for oral/intraduodenal administration.
    Type: Application
    Filed: April 30, 2004
    Publication date: November 4, 2004
    Inventors: Hakan Wikstrom, Durk Dijkstra, Thomas Ivo Franciscus Hubert Cremers
  • Publication number: 20040138281
    Abstract: Compounds of the general formula I 1
    Type: Application
    Filed: December 18, 2003
    Publication date: July 15, 2004
    Applicant: AXON BIOCHEMICALS B.V.
    Inventors: Hakan Wikstrom, Durk Dijkstra, Bastiaan Johan Venhuis
  • Publication number: 20040018956
    Abstract: New aporphine derivatives are disclosed which have formula (I) and the physiologically acceptable salts thereof. Said derivatives may be used for the treatment of Parkinson's disease, hemicrania, restless legs syndrome (RLS), sexual dysfunction in men and women, hyperprolactemia and psychotic disorders, and/or evaluation of Parkinson's disease. Processes for the preparation of such derivatives are also disclosed.
    Type: Application
    Filed: July 15, 2003
    Publication date: January 29, 2004
    Inventors: Hakan Wikstrom, Durk Dijkstra, Thomas Cremers, Per Erik Andren, Sandrine Marchais, Ulrik Jurva
  • Patent number: 6683087
    Abstract: Compounds of the general formula I and salts thereof with pharmaceutically acceptable acids or bases are disclosed as well as the use of such compounds for the manufacturing of pharmaceutical compositions for the treatment of Parkinson's disease, psychoses, Huntington's disease, impotence, renal failure, heart failure or hypertension. Pharmaceutical compositions and methods of treating Parkinson's disease and schizophrenia are also disclosed.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: January 27, 2004
    Assignee: Axon Biochemicals B.V.
    Inventors: Håkan Wikström, Durk Dijkstra, Bastiaan Johan Venhuis
  • Publication number: 20030087948
    Abstract: Compounds of the general formula I 1
    Type: Application
    Filed: October 18, 2002
    Publication date: May 8, 2003
    Inventors: Hakan Wikstrom, Durk Dijkstra, Bastiaan Johan Venhuis
  • Patent number: 6291494
    Abstract: The invention relates to 2-aminothiazol-fused 2-aminoindans and 2-aminotetralins having general formula (1): wherein R1 and R2, which may be identical or different, are selected from the group consisting of a hydrogen atom, alkyl or haloalkyl groups of 1 to 7 carbon atoms, (alkyl)cycloalkyl groups of 3 to 7 carbon atoms, alkenyl or alkynyl groups of 3 to 6 carbon atoms, arylalkyl having 1 to 3 carbon atoms in the alkyl moiety, while the aryl nucleus may be substituted; and n and m are 1 or 2; and the enantiomers and the acid addition salts thereof, pharmaceutical compositions containing them and their use in the preparation of medicaments having an effect on the dopaminergic system of the central nervous system and/or the circulation.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: September 18, 2001
    Inventors: Håkan Vilhelm Wikström, Per Erik Andrén, Per Arvid Emil Carlsson, Durk Dijkstra, Lars Gunne, Leonard Alexander Van Vliet
  • Patent number: 4255972
    Abstract: Device for the inspection of a weld joint between a tubular stub and a wall, whereby a test probe is carrying out a rotational as well as a translational movement with respect to the stub, so that the probe is moved substantially parallel to the plane of the weld joint and the angle under which the weld joint is scanned remains substantially the same irrespective of the angle between the axis of the tubular stub and the wall.
    Type: Grant
    Filed: January 17, 1979
    Date of Patent: March 17, 1981
    Assignee: Rontgen Technische Dienst B.V.
    Inventor: Durk Dijkstra
  • Patent number: 4150407
    Abstract: An electrically controllable carrying arm arrangement for a magnetic disc store and comprising a carrying arm which at one of its ends carries a number of magnetic heads and at its other end is provided with a drive coil with the aid of which the carrying arm is pivoted, so that the magnetic heads are moved over the surface of a storage disc. The drive coil has a flat shape and a small thickness and moves in an air gap between two flat axially magnetized permanent magnets which belong to a stator of the arrangement. Preferably, the drive coil and the carrying arm are disposed in one plane which is perpendicular to the pivoting axis of the carrying arm, so that a compact unit is obtained which demands little mounting height. When a multiple carrying arm arrangement is desired, a plurality of carrying arms of the type described hereinbefore are stacked onto each other with intermediate spacings, while the stator construction is also obtained by stacking a plurality of stators.
    Type: Grant
    Filed: October 28, 1977
    Date of Patent: April 17, 1979
    Assignee: U.S. Philips Corporation
    Inventor: Durk Dijkstra
  • Patent number: RE42802
    Abstract: Compounds of the general formula I wherein rings B, C, D and E may be present or not and, when present, are combined with A as A+C, A+E, A+B+C, A+B+D, A+B+E, A+C+E, A+B+C+D or A+B+C+D+E, rings B, C and E being aliphatic whereas ring D may be aliphatic or aromatic/heteroaromatic, and wherein X is —(CH2)m—, in which m is an integer 1-3, to form a ring E or, when E is absent, a group R1 bound to the nitrogen atom, wherein R1 is selected from the group consisting of a hydrogen atom, alkyl or haloalkyl groups of 1 to 3 carbon atoms, cycloalkyl(alkyl) groups of 3 to 5 carbon atoms (i.e.
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: October 4, 2011
    Assignee: H. Lundbeck A/S
    Inventors: Hâkan Vilheim Wikström, Durk Dijkstra, Bastiaan Johan Venhuis
  • Patent number: RE43244
    Abstract: Compounds of the general formula I wherein rings B, C, D and E may be present or not and, when present, are combined with A as A+C, A+E, A+B+C, A+B+D, A+B+E, A+C+E, A+B+C+D or A+B+C+D+E, rings B, C and E being aliphatic whereas ring D may be aliphatic or aromatic/heteroaromatic, and wherein X is —(CH2)m—, in which m is an integer 1-3, to form a ring E or, when E is absent, a group R1 bound to the nitrogen atom, wherein R1 is selected from the group consisting of a hydrogen atom, alkyl or haloalkyl groups of 1 to 3 carbon atoms, cycloalkyl(alkyl) groups of 3 to 5 carbon atoms (i.e.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: March 13, 2012
    Assignee: H. Lundbeck A/S
    Inventors: Håkan Vilhelm Wikström, Durk Dijkstra, Bastiaan Johan Venhuis