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).
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Patent number: 12187749Abstract: 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 iridium(III) complex structures incorporating a substituted 2,3,5,6-tetrafluorophenyl-dipyrromethene (2,3,5,6-tetratfluorophenyldipyrrin) unit or a substituted 3-nitrophenyl-dipyrromethene (3-nitrophenyl-dipyrrin) unit.Type: GrantFiled: January 31, 2023Date of Patent: January 7, 2025Assignee: BIOLITEC UNTERNEHMENSBETEILIGUNGS III AGInventors: Benjamin Florian Hohlfeld, Arno Wiehe, Burkhard Gitter, Dorika Steen, Gerhard Wieland, Volker Albrecht
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Publication number: 20240199628Abstract: Biologically active compounds are provided that may be used as photosensitizers for diagnostic and therapeutic applications, particularly for phototherapy, including photodynamic therapy, of viral or bacterial infections. As the compounds exhibit also toxicity against targets (bacteria, viruses) without light these biologically active compounds may also be used for the light-independent treatment of such diseases. Embodiments include porphyrins, chlorins, and dihydroxy chlorins as well as their zinc complexes. Also included are embodiments where these compounds are incorporated into liposomal formulations.Type: ApplicationFiled: April 4, 2023Publication date: June 20, 2024Inventors: Volker Albrecht, Hagen Von Briesen, Dietrich Scheglmann, Burkhard Gitter, Arno Wiehe, Sylvia Wagner, Anja Germann, Dorika STEEN, Gerhard Wieland
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Publication number: 20230242559Abstract: 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: ApplicationFiled: January 31, 2023Publication date: August 3, 2023Applicant: BIOLITEC UNTERENEHMENSBETEILIGUNGS II AGInventors: Benjamin Florian Hohlfeld, Arno Wiehe, Burkhard Gitter, Dorika Steen, Gerhard Wieland, Volker Albrecht
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Publication number: 20220380388Abstract: 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: ApplicationFiled: November 5, 2020Publication date: December 1, 2022Inventors: Benjamin Florian Hohlfeld, Arno Wiehe, Burkhard Gitter, Dorika Steen, Gerhard Wieland, Volker Albrecht
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Publication number: 20220047705Abstract: 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: ApplicationFiled: September 24, 2019Publication date: February 17, 2022Applicants: WESTFÄLISCHE WILHELMS-UNIVERSITÄT MÜNSTER, UNIVERSITÄT PADERBORN, BIOLITEC RESEARCH GMBHInventors: Klaus LANGER, Juliane ANDERSKI, Laura MAHLERT, Dennis MULAC, Dirk KUCKLING, Jingjiang SUN, Wolfgang BIRNBAUM, Arno WIEHE, Gerhard Dieter WIELAND, Volker ALBRECHT
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Publication number: 20220025185Abstract: 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: ApplicationFiled: December 10, 2019Publication date: January 27, 2022Inventors: Rene Klingenburg, Christian B. W. Stark, Daniel Aicher, Arno Wiehe, Susanna Grafe, Volker Albrecht
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Patent number: 10781227Abstract: 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: GrantFiled: February 4, 2019Date of Patent: September 22, 2020Assignee: Biolitec Unternehmensbeteiligungs II AGInventors: Claudia S. Gutsche, Arno Wiehe, Benjamin F. Hohlfeld, Burkhard Gitter, Volker Albrecht
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Patent number: 10738059Abstract: 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: GrantFiled: February 27, 2017Date of Patent: August 11, 2020Assignee: Biolitec Unternehmensbeteiligungs II AGInventors: Michael Staegemann, Rainer Haag, Arno Wiehe, Susanna Graefe, Burkhard Gitter, Volker Albrecht
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Publication number: 20200022955Abstract: 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: ApplicationFiled: September 23, 2019Publication date: January 23, 2020Inventors: Hartwig Richard Arthur Golf, Arno Wiehe, Susanna Graefe, Volker Albrecht, Hans-Ulrich Reißig
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Patent number: 10456375Abstract: 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: GrantFiled: September 30, 2015Date of Patent: October 29, 2019Assignee: Biolitec Unternehmensbeteiligungs II AGInventors: Hartwig Richard Arthur Golf, Arno Wiehe, Susanna Graefe, Volker Albrecht, Hans-Ulrich Reißig
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Publication number: 20190241593Abstract: 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: ApplicationFiled: February 4, 2019Publication date: August 8, 2019Inventors: Claudia S. Gutsche, Arno Wiehe, Benjamin F. Hohlfeld, Burkhard Gitter, Volker Albrecht
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Patent number: 10350552Abstract: 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: GrantFiled: April 29, 2015Date of Patent: July 16, 2019Assignee: WTA VOGTLAND GMBHInventors: Reinhard Voigt, Volker Albrecht, Hardy Mueller, Kurt Bock, Eberhard Semmler
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Publication number: 20180036284Abstract: 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: ApplicationFiled: September 30, 2015Publication date: February 8, 2018Applicants: Biolitec Unternehmensbeteiligungs II AG, Freie Universität BerlinInventors: Hartwig Richard Arthur Golf, Arno Wiehe, Susanna Graefe, Volker Albrecht, Hans-Ulrich Reißig
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Publication number: 20170247384Abstract: 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: ApplicationFiled: February 27, 2017Publication date: August 31, 2017Inventors: Michael Staegemann, Rainer Haag, Arno Wiehe, Susanna Graefe, Burkhard Gitter, Volker Albrecht
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Patent number: 9656192Abstract: 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: GrantFiled: September 21, 2012Date of Patent: May 23, 2017Assignee: WTA Vogtland GmbHInventors: Reinhard Voigt, Kurt Bock, Eberhard Semmler, Volker Albrecht, Barbara Zimmerman
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Publication number: 20170056836Abstract: 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: ApplicationFiled: April 29, 2015Publication date: March 2, 2017Applicant: WTA VOGTLAND GmbHInventors: Reinhard VOIGT, Volker ALBRECHT, Hardy MUELLER, Kurt BOCK, Eberhard SEMMLER
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Patent number: 9409037Abstract: 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: GrantFiled: January 13, 2011Date of Patent: August 9, 2016Assignee: Biolitec Pharma Marketing LTDInventors: Volker Albrecht, Gerhard Wieland, Burkhard Gitter, Wolfgang Neuberger
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Patent number: 9315510Abstract: 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: GrantFiled: September 17, 2009Date of Patent: April 19, 2016Assignee: Biolitec Pharma Marketing LTDInventors: Arno Wiehe, Daniel Aicher, Christian B. W. Stark, Volker Albrecht, Susanna Gräfe
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Patent number: 9308185Abstract: Antimicrobial molecular conjugates for the treatment and prevention of infectious diseases caused by pathogenic microorganisms in human and animals are provided.Type: GrantFiled: July 22, 2011Date of Patent: April 12, 2016Assignee: Biolitec Pharma Marketing LTDInventors: Daniel Aicher, Volker Albrecht, Burkhard Gitter, Christian B. W. Stark, Arno Wiehe
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Patent number: 9211283Abstract: 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: GrantFiled: November 8, 2010Date of Patent: December 15, 2015Assignee: Biolitec Pharma Marketing LtdInventors: Klaus Langer, Matthias Wacker, Beate Röder, Annegret Preuss, Volker Albrecht, Susanna Gräfe, Arno Wiehe, Hagen von Briesen, Karin Löw, Sylvia Wagner