Patents by Inventor Volker Albrecht

Volker Albrecht 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: 20230242559
    Abstract: Biologically active compounds and their methods of preparation are provided that may be used as photosensitizers for diagnostic and therapeutic applications, particularly for PDT of cancer, infectious and other hyperproliferative diseases, fluorescence diagnosis and PDT treatment of non-tumorous indications such as arthritis, inflammatory diseases, viral or bacterial infections, dermatological otorhinolanyingology disorders, ophthalmological or urological disorders. As the compounds exhibit also toxicity against targets (tumor cells, bacteria, inflammation-related cells) without light these biologically active compounds may also be used for the light-independent treatment of such indications. Embodiments also include methods to synthesize iridium(III) complex structures incorporating a substituted 2,3,5,6-tetrafluorophenyl-dipyrromethene (2,3,5,6-tetrafluorophenyldipyrrin) unit or a substituted 3-mtrophenyl-dipyrromethene (3-nitroplienyl-dipyrritt) unit.
    Type: Application
    Filed: January 31, 2023
    Publication date: August 3, 2023
    Applicant: BIOLITEC UNTERENEHMENSBETEILIGUNGS II AG
    Inventors: Benjamin Florian Hohlfeld, Arno Wiehe, Burkhard Gitter, Dorika Steen, Gerhard Wieland, Volker Albrecht
  • Publication number: 20220380388
    Abstract: Biologically active compounds and their methods of preparation are provided that may be used as photosensitizers for diagnostic and therapeutic applications, particularly for PDT of cancer, infections and other hyperproliferative diseases, fluorescence diagnosis and PDT treatment of non-tumorous indications such as arthritis, inflammatory diseases, viral or bacterial infections, dermatological, otorhinolaryngology disorders, ophthalmological or urological disorders. As the compounds exhibit also toxicity against targets (tumor cells, bacteria, inflammation-related cells) without light these biologically active compounds may also be used for the light-independent treatment of such indications. Embodiments also include methods to synthesize boron dipyrromethene complex structures incorporating a substituted 2,3,5,6-tetrafluorophenyl-dipyrromethene (2,3,5,6-tetrafluorophenyldipyrrin) unit or a substituted 3-nitrophenyl-dipyrromethene (3-nitrophenyl-dipyrrin) unit.
    Type: Application
    Filed: November 5, 2020
    Publication date: December 1, 2022
    Inventors: Benjamin Florian Hohlfeld, Arno Wiehe, Burkhard Gitter, Dorika Steen, Gerhard Wieland, Volker Albrecht
  • Publication number: 20220047705
    Abstract: The present invention generally relates to the formation, chemistry and application of biologically active compositions. More particularly, the present invention relates to certain dyes, specifically porphyrin and chlorin derivatives, in combination with inventive polymers, i.e. light-cleavable polymers, that can be used as photosensitizer compositions for a wide range of light irradiation treatments such as photodynamic therapy of cancer, infections and other diseases. The dye derivatives may either be adsorbed on, or incorporated in, or attached to specific polymers, which as well form part of the invention.
    Type: Application
    Filed: September 24, 2019
    Publication date: February 17, 2022
    Applicants: WESTFÄLISCHE WILHELMS-UNIVERSITÄT MÜNSTER, UNIVERSITÄT PADERBORN, BIOLITEC RESEARCH GMBH
    Inventors: Klaus LANGER, Juliane ANDERSKI, Laura MAHLERT, Dennis MULAC, Dirk KUCKLING, Jingjiang SUN, Wolfgang BIRNBAUM, Arno WIEHE, Gerhard Dieter WIELAND, Volker ALBRECHT
  • Publication number: 20220025185
    Abstract: The present invention provides certain tetrapyrrolic compounds having a structure of Formula (1), (2), or (3) wherein B is (I), (II) (III) or (IV), O—R1 is a substituent in the meta or para position of the phenyl ring, R1 is a glyco-substituent derived from a mono-, di-, or trisaccharide group, and each R2 is independently selected from the group consisting of a linear or branched (fluoro-)alkyl group with 3 to 8 carbon atoms, phenyl, pentafluorophenyl, 3,5-bis(trifluoromethyl)phenyl, 4-(1?-thio-?-D-glucosyl)-2,3,5,6-tetrafluorophenyl, 4-(1?-thio-?-D-galactosyl)-2,3,5,6-tetrafluorophenyl, meta- or para-hydroxyphenyl, meta- or para-carboxyphenyl, and meta- or para-YO-phenyl with Y being a polyethyleneglycol-residue with (CH2CH2O)nCH3 with n=1-30.
    Type: Application
    Filed: December 10, 2019
    Publication date: January 27, 2022
    Inventors: Rene Klingenburg, Christian B. W. Stark, Daniel Aicher, Arno Wiehe, Susanna Grafe, Volker Albrecht
  • Patent number: 10781227
    Abstract: The present invention provides biologically active compounds and methods to obtain biologically active compounds that can be used as photosensitizers for diagnostic and therapeutic applications, particularly for PDT of cancer, infections and other hyperproliferative diseases, fluorescence diagnosis and PDT treatment of non-tumorous indications such as arthritis, inflammatory diseases, viral or bacterial infections, dermatological, ophthalmological or urological disorders. As the compounds exhibit also toxicity against targets (tumor cells, bacteria, inflammation-related cells) without light these biologically active compounds may also be used for the light-independent treatment of such indications. Preferred embodiments of the present invention consist of methods to synthesize metal or half-metal complex structures incorporating one or more substituted 2,3,5,6-tetrafluorophenyl-dipyrromethene (2,3,5,6-tetrafluorophenyldipyrrin) units.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: September 22, 2020
    Assignee: Biolitec Unternehmensbeteiligungs II AG
    Inventors: Claudia S. Gutsche, Arno Wiehe, Benjamin F. Hohlfeld, Burkhard Gitter, Volker Albrecht
  • Patent number: 10738059
    Abstract: Biologically active compounds that can be used as photosensitizers for diagnostic and therapeutic applications, particularly for PDT of cancer, infections and other hyperproliferative diseases, fluorescence diagnosis and PDT treatment of a non-tumorous indication such as arthritis, inflammatory diseases, viral or bacterial infections, dermatological, ophthalmological or urological disorders are provided as well as providing methods to obtain them in pharmaceutical quality. In addition, conjugates are provided in which these photosensitizers are attached to water-soluble polymers via cleavable linkers that can be cleaved in the body under specific conditions. Another embodiment consists of formulating the desired tetrapyrrole photosensitizer into a pharmaceutical formulation to be injected into the body avoiding undesirable effects like solubility problems or delayed pharmacokinetics of the tetrapyrrole systems.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: August 11, 2020
    Assignee: Biolitec Unternehmensbeteiligungs II AG
    Inventors: Michael Staegemann, Rainer Haag, Arno Wiehe, Susanna Graefe, Burkhard Gitter, Volker Albrecht
  • Publication number: 20200022955
    Abstract: Biologically active compounds that can be used as photosensitizers for diagnostic and therapeutic applications, particularly for PDT of cancer, infections and other hyperproliferative diseases, fluorescence diagnosis and PDT treatment of a non-tumorous indication such as arthritis, inflammatory diseases, viral or bacterial infections, dermatological, opthamological or urological disorders are provided as well as providing methods to obtain them in pharmaceutical quality. One embodiment consists of a method to synthesize a porphyrin with a defined arrangement of meso-substituents and then converting this porphyrin system to a chlorin system by dihydroxylation or reduction, and if more than one isomer is formed separate them by chromatography either on normal or reversed phase silica. In another embodiment the substituents on the porphyrin are selected to direct the reduction or dihydroxylation to the chlorin so that a certain isomer is selectively formed.
    Type: Application
    Filed: September 23, 2019
    Publication date: January 23, 2020
    Inventors: Hartwig Richard Arthur Golf, Arno Wiehe, Susanna Graefe, Volker Albrecht, Hans-Ulrich Reißig
  • Patent number: 10456375
    Abstract: Biologically active compounds that can be used as photosensitizers for diagnostic and therapeutic applications, particularly for PDT of cancer, infections and other hyperproliferative diseases, fluorescence diagnosis and PDT treatment of a non-tumorous indication such as arthritis, inflammatory diseases, viral or bacterial infections, dermatological, opthamological or urological disorders are provided as well as providing methods to obtain them in pharmaceutical quality. One embodiment consists of a method to synthesize a porphyrin with a defined arrangement of meso-substituents and then converting this porphyrin system to a chlorin system by dihydroxylation or reduction, and if more than one isomer is formed separate them by chromatography either on normal or reversed phase silica. In another embodiment the substituents on the porphyrin are selected to direct the reduction or dihydroxylation to the chlorin so that a certain isomer is selectively formed.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: October 29, 2019
    Assignee: Biolitec Unternehmensbeteiligungs II AG
    Inventors: Hartwig Richard Arthur Golf, Arno Wiehe, Susanna Graefe, Volker Albrecht, Hans-Ulrich Reißig
  • Publication number: 20190241593
    Abstract: The present invention provides biologically active compounds and methods to obtain biologically active compounds that can be used as photosensitizers for diagnostic and therapeutic applications, particularly for PDT of cancer, infections and other hyperproliferative diseases, fluorescence diagnosis and PDT treatment of non-tumorous indications such as arthritis, inflammatory diseases, viral or bacterial infections, dermatological, ophthalmological or urological disorders. As the compounds exhibit also toxicity against targets (tumor cells, bacteria, inflammation-related cells) without light these biologically active compounds may also be used for the light-independent treatment of such indications. Preferred embodiments of the present invention consist of methods to synthesize metal or half-metal complex structures incorporating one or more substituted 2,3,5,6-tetrafluorophenyl-dipyrromethene (2,3,5,6-tetrafluorophenyldipyrrin) units.
    Type: Application
    Filed: February 4, 2019
    Publication date: August 8, 2019
    Inventors: Claudia S. Gutsche, Arno Wiehe, Benjamin F. Hohlfeld, Burkhard Gitter, Volker Albrecht
  • Patent number: 10350552
    Abstract: The invention relates to a filter element (1) comprising a drainage element (2) which is arranged between two filter membranes (3). According to the invention, said drainage element (2) is made of a non-woven filtering material which is arranged in a laminated manner between the filter membranes (3) respectively by means of an adhesive non-woven material (4). The invention also relates to a method for producing a filter element (1), a drainage element (2) made from a non-woven filtering material being laminated between two filter membranes (3). An adhesive non-woven material (4) is arranged between the drainage element (2) and each filter membrane (3), then lamination takes place due to the thermal effect under pressure.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: July 16, 2019
    Assignee: WTA VOGTLAND GMBH
    Inventors: Reinhard Voigt, Volker Albrecht, Hardy Mueller, Kurt Bock, Eberhard Semmler
  • Publication number: 20180036284
    Abstract: Biologically active compounds that can be used as photosensitizers for diagnostic and therapeutic applications, particularly for PDT of cancer, infections and other hyperproliferative diseases, fluorescence diagnosis and PDT treatment of a non-tumorous indication such as arthritis, inflammatory diseases, viral or bacterial infections, dermatological, opthamological or urological disorders are provided as well as providing methods to obtain them in pharmaceutical quality. One embodiment consists of a method to synthesize a porphyrin with a defined arrangement of meso-substituents and then converting this porphyrin system to a chlorin system by dihydroxylation or reduction, and if more than one isomer is formed separate them by chromatography either on normal or reversed phase silica. In another embodiment the substituents on the porphyrin are selected to direct the reduction or dihydroxylation to the chlorin so that a certain isomer is selectively formed.
    Type: Application
    Filed: September 30, 2015
    Publication date: February 8, 2018
    Applicants: Biolitec Unternehmensbeteiligungs II AG, Freie Universität Berlin
    Inventors: Hartwig Richard Arthur Golf, Arno Wiehe, Susanna Graefe, Volker Albrecht, Hans-Ulrich Reißig
  • Publication number: 20170247384
    Abstract: Biologically active compounds that can be used as photosensitizers for diagnostic and therapeutic applications, particularly for PDT of cancer, infections and other hyperproliferative diseases, fluorescence diagnosis and PDT treatment of a non-tumorous indication such as arthritis, inflammatory diseases, viral or bacterial infections, dermatological, ophthalmological or urological disorders are provided as well as providing methods to obtain them in pharmaceutical quality. In addition, conjugates are provided in which these photosensitizers are attached to water-soluble polymers via cleavable linkers that can be cleaved in the body under specific conditions. Another embodiment consists of formulating the desired tetrapyrrole photosensitizer into a pharmaceutical formulation to be injected into the body avoiding undesirable effects like solubility problems or delayed pharmacokinetics of the tetrapyrrole systems.
    Type: Application
    Filed: February 27, 2017
    Publication date: August 31, 2017
    Inventors: Michael Staegemann, Rainer Haag, Arno Wiehe, Susanna Graefe, Burkhard Gitter, Volker Albrecht
  • Patent number: 9656192
    Abstract: A filter element for cleaning liquids, having a stack of at least two filter membrane pockets, which are substantially flat and include a flexible, liquid-permeable filter material for retaining waste particles and/or microbes, wherein each filter membrane pocket has a substantially polygonal shape with at least three corners and a corresponding number of edges, wherein the filter membrane pockets are stacked with a defined distance and aligned with each other, wherein aligned corners of the filter membrane pockets are embedded in a casting covering only part of the adjacent edges such that the casting for each corner is spaced from the castings of the neighboring corners.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: May 23, 2017
    Assignee: WTA Vogtland GmbH
    Inventors: Reinhard Voigt, Kurt Bock, Eberhard Semmler, Volker Albrecht, Barbara Zimmerman
  • Publication number: 20170056836
    Abstract: The invention relates to a filter element (1) comprising a drainage element (2) which is arranged between two filter membranes (3). According to the invention, said drainage element (2) is made of a non-woven filtering material which is arranged in a laminated manner between the filter membranes (3) respectively by means of an adhesive non-woven material (4). The invention also relates to a method for producing a filter element (1), a drainage element (2) made from a non-woven filtering material being laminated between two filter membranes (3). An adhesive non-woven material (4) is arranged between the drainage element (2) and each filter membrane (3), then lamination takes place due to the thermal effect under pressure.
    Type: Application
    Filed: April 29, 2015
    Publication date: March 2, 2017
    Applicant: WTA VOGTLAND GmbH
    Inventors: Reinhard VOIGT, Volker ALBRECHT, Hardy MUELLER, Kurt BOCK, Eberhard SEMMLER
  • Patent number: 9409037
    Abstract: Methods and devices to eliminate, reduce, destroy and/or inhibit undesired body fluid species, such as pathogen microbes and deteriorated or malignant cells in complex environments like blood, serum and other body fluids are provided. In preferred embodiments, an antimicrobial photodynamic therapy (PDT) treatment is given that effectively inactivates, reduces and/or destroys both Gram (?) and Gram (+) bacteria in complex body fluids. Methods to enhance antimicrobial PDT activity include administering a photosensitizer to bacteria-contaminated fluid, after a dwell time guiding bacteria-contaminated fluid with photosensitizer through a channel, emitting radiation preferably in an intermittent manner, and restoring treated body fluids to corresponding body regions. Electromagnetic radiation is preferably delivered intermittently with pulse width based on treatment parameters.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: August 9, 2016
    Assignee: Biolitec Pharma Marketing LTD
    Inventors: Volker Albrecht, Gerhard Wieland, Burkhard Gitter, Wolfgang Neuberger
  • Patent number: 9315510
    Abstract: Biologically active compounds are provided that can be used as photosensitizers for diagnostic and therapeutic applications, particularly for PDT of cancer, infections and other hyperproliferative diseases, fluorescence diagnosis and PDT treatment of a non-tumorous indication such as arthritis, inflammatory diseases, viral or bacterial infections, dermatological, ophthalmological or urological disorders as well as providing methods to obtain them in pharmaceutical quality. One embodiment consists of a method to synthesize a porphyrin with a defined arrangement of meso-substituents and then converting this porphyrin system to a chlorin system by dihydroxylation or reduction, and if more than one isomer is formed separate them by chromatography either on normal or reversed phase silica. In another embodiment the substituents on the porphyrin are selected to direct the reduction or dihydroxylation to the chlorin so that a certain isomer is selectively formed.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: April 19, 2016
    Assignee: Biolitec Pharma Marketing LTD
    Inventors: Arno Wiehe, Daniel Aicher, Christian B. W. Stark, Volker Albrecht, Susanna Gräfe
  • Patent number: 9308185
    Abstract: Antimicrobial molecular conjugates for the treatment and prevention of infectious diseases caused by pathogenic microorganisms in human and animals are provided.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: April 12, 2016
    Assignee: Biolitec Pharma Marketing LTD
    Inventors: Daniel Aicher, Volker Albrecht, Burkhard Gitter, Christian B. W. Stark, Arno Wiehe
  • Patent number: 9211283
    Abstract: Compositions, which are stable in storage, and a method of production of pharmaceutical based nanoparticulate formulations for photodynamic therapy comprising a hydrophobic photosensitizer, human serum albumin (HSA) and stabilizing agent are provided. These nanoparticulate formulations provide therapeutically effective amounts of photosensitizer (PS) for parenteral administration. In particular, tetrapyrrole derivatives can be used as photosensitizers whose efficacy and safety are enhanced by such nanoparticulate formulations. A method of preparing the HSA-based nanoparticles under sterile conditions is also provided. In one of the preferred embodiments of the present invention temoporfin, a hydrophobic PS, is formulated as a nanoparticle for parenteral administration. The formulations are useful for treating hyperplasic and neoplasic conditions, inflammatory problems, and more specifically to target tumor cells.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: December 15, 2015
    Assignee: Biolitec Pharma Marketing Ltd
    Inventors: Klaus Langer, Matthias Wacker, Beate Röder, Annegret Preuss, Volker Albrecht, Susanna Gräfe, Arno Wiehe, Hagen von Briesen, Karin Löw, Sylvia Wagner
  • Patent number: 9156849
    Abstract: The present invention provides biologically active compounds that can be used as photosensitizers for diagnostic and therapeutic applications, particularly for PDT of cancer, infections and other hyperproliferative diseases, fluorescence diagnosis and PdT treatment of a non-tumorous indication such as arthritis, inflammatory diseases, viral or bacterial infections, dermatological, ophthalmological or urological disorders.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: October 13, 2015
    Assignee: Biolitec Pharma Marketing LTD
    Inventors: Daniel Aicher, Arno Wiehe, Christian B. W. Stark, Volker Albrecht, Susanna Gräfe
  • Publication number: 20150209700
    Abstract: A filter element for cleaning liquids, having a stack of at least two filter membrane pockets, which are substantially flat and include a flexible, liquid-permeable filter material for retaining waste particles and/or microbes, wherein each filter membrane pocket has a substantially polygonal shape with at least three corners and a corresponding number of edges, wherein the filter membrane pockets are stacked with a defined distance and aligned with each other, wherein aligned corners of the filter membrane pockets are embedded in a casting covering only part of the adjacent edges such that the casting for each corner is spaced from the castings of the neighbouring corners.
    Type: Application
    Filed: September 21, 2012
    Publication date: July 30, 2015
    Inventors: Reinhard Voigt, Kurt Bock, Eberhard Semmler, Volker Albrecht, Barbara Zimmermann