Patents Assigned to Endocyte, Inc.
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Publication number: 20190083631Abstract: The present disclosure relates to compositions and methods of carbonic anhydrase IX inhibitors. The present disclosure also relates to targeting conjugates of carbonic anhydrase IX inhibitors as therapeutics and imaging agents. The present disclosure also relates to the use of targeting conjugates of carbonic anhydrase IX inhibitors in imaging methods and cancer therapy.Type: ApplicationFiled: March 16, 2017Publication date: March 21, 2019Applicant: Endocyte, Inc.Inventors: Christopher P. LEAMON, Iontcho R. VLAHOV, Jonathan M. SHILLINGFORD, Paul J. KLEINDL
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Patent number: 10188759Abstract: The invention described herein relates to conjugates and compositions for imaging, diagnosing, and/or monitoring diseases using radionuclide-based imaging. In particular, the invention described herein relates to conjugates and compositions for imaging, diagnosing, and/or monitoring diseases using positron emission tomography.Type: GrantFiled: January 6, 2016Date of Patent: January 29, 2019Assignee: Endocyte, Inc.Inventors: Iontcho R. Vlahov, Christopher P. Leamon, Hari Krishna R. Santhapuram
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Patent number: 10010618Abstract: Described are methods, uses, and kits for utilizing a targeted ligand conjugate in combination with a thiol inhibitor or a system xc? inhibitor for the treatment of cancer or inflammation. Also described are in vitro assays utilizing a targeted ligand conjugate in combination with a thiol inhibitor or a system xc? inhibitor.Type: GrantFiled: November 24, 2015Date of Patent: July 3, 2018Assignee: Endocyte, Inc.Inventors: Nikki L. Parker, Christopher P. Leamon, Iontcho R. Vlahov
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Patent number: 9877965Abstract: Described herein are compositions, methods, compounds, conjugates, and kits for use in targeted drug delivery using drug delivery conjugates containing hydrophilic spacer linkers for use in treating disease states caused by pathogenic cell populations, such as inflammatory cells.Type: GrantFiled: March 27, 2015Date of Patent: January 30, 2018Assignee: Endocyte, Inc.Inventors: Christopher Paul Leamon, Iontcho Radoslavov Vlahov, Yingjuan June Lu, Kevin Yu Wang, Fei Yu, Paul Joseph Kleindl, Hari Krishna R. Santhapuram
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Patent number: 9782493Abstract: The invention described herein pertains to the diagnosis, imaging, and/or treatment of pathogenic cell populations. In particular, the invention described herein pertains to the diagnosis, imaging, and/or treatment of diseases caused by PSMA expressing cells, such as prostate cancer cells, using compounds capable of targeting PSMA expressing cells.Type: GrantFiled: August 24, 2016Date of Patent: October 10, 2017Assignee: ENDOCYTE, INC.Inventors: Iontcho Radoslavov Vlahov, Joseph Anand Reddy, Alicia Bloomfield, Ryan Dorton, Melissa Nelson, Marilynn Vetzel, Christopher Paul Leamon
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Patent number: 9771391Abstract: The invention described herein pertains to processes for preparing tubulysins and derivatives thereof. The invention described herein also pertains to processes for preparing tubulysin conjugates. The invention described herein also pertains to processes for preparing intermediates for preparing tubulysin conjugates. In one step, the alpha-thiazolyl alcohol is protected with triethylsilyl chloride in the presence of imidazole in an aprotic solvent.Type: GrantFiled: February 28, 2014Date of Patent: September 26, 2017Assignee: Endocyte, Inc.Inventors: Iontcho Radoslavov Vlahov, Christopher Paul Leamon
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Publication number: 20170246314Abstract: Conjugates of antifolates, releasable linkers, and drugs, and pharmaceutical compositions containing them are described. The conjugates are useful for treating diseases arising from pathogenic cell populations. Methods for treating stroll diseases are also described.Type: ApplicationFiled: December 13, 2016Publication date: August 31, 2017Applicants: Purdue Research Foundation, Endocyte, Inc.Inventors: Christopher Paul Leamon, Iontcho Radoslavov Vlahov, Philip Stewart Low
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Patent number: 9745341Abstract: Processes are described for the preparation of tubulysins. The processes are useful for preparing predetermined mixtures of tubulysins, preparing single tubulysins from mixtures of tubulysins, and for converting one tubulysin into a different tubulysin. The tubulysins described herein are useful in treating diseases and disease states that include pathogenic cell populations.Type: GrantFiled: October 23, 2015Date of Patent: August 29, 2017Assignee: Endocyte, Inc.Inventors: Iontcho Radoslavov Vlahov, Christopher Paul Leamon, Kevin Yu Wang
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Patent number: 9662402Abstract: Described herein are drug delivery conjugates for targeted therapy. In particular, described herein are drug delivery conjugates that include polyvalent linkers comprising one or more unnatural amino acids that are useful for treating cancers and inflammatory diseases. The invention described herein pertains to drug delivery conjugates for targeted therapy. In particular, the invention described herein pertains to drug delivery conjugates that include polyvalent linkers comprising one or more unnatural amino acids.Type: GrantFiled: October 15, 2013Date of Patent: May 30, 2017Assignee: Endocyte, Inc.Inventors: Iontcho Radoslavov Vlahov, Christopher Paul Leamon
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Patent number: 9636413Abstract: The invention described herein pertains to the diagnosis, imaging, and/or treatment of pathogenic cell populations. In particular, the invention described herein pertains to the diagnosis, imaging, and/or treatment of diseases caused by PSMA expressing cells, such as prostate cancer cells, using compounds capable of targeting PSMA expressing cells.Type: GrantFiled: November 14, 2013Date of Patent: May 2, 2017Assignee: ENDOCYTE, INC.Inventors: Iontcho Radoslavov Vlahov, Joseph Anand Reddy, Alicia Bloomfield, Ryan Dorton, Melissa Nelson, Marilynn Vetzel, Christopher Paul Leamon
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Patent number: 9555139Abstract: Described herein are compounds, pharmaceutical compositions and methods for treating pathogenic cell populations. The compounds described herein include conjugates of tubulysins and vitamin receptor binding ligands. The conjugates also include a releasable bivalent linker.Type: GrantFiled: March 13, 2008Date of Patent: January 31, 2017Assignee: Endocyte, Inc.Inventors: Iontcho Radoslavov Vlahov, Christopher Paul Leamon, Yu Wang
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Patent number: 9549992Abstract: Conjugates of antifolates, releasable linkers, and drugs, and pharmaceutical compositions containing them are described. The conjugates are useful for treating diseases arising from pathogenic cell populations. Methods for treating such diseases are also described.Type: GrantFiled: October 21, 2015Date of Patent: January 24, 2017Assignees: Purdue Research Foundation, Endocyte, Inc.Inventors: Christopher Paul Leamon, Iontcho Radoslavov Vlahov, Philip Stewart Low
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Patent number: 9550734Abstract: Bivalent linkers to be included in or for preparing vitamin, drug, diagnostic agent, and/or imaging agent conjugates are described.Type: GrantFiled: June 22, 2015Date of Patent: January 24, 2017Assignee: Endocyte, Inc.Inventors: Iontcho R. Vlahov, Christopher P. Leamon, Apparao Satyam, Stephen J. Howard
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Patent number: 9505747Abstract: The invention described herein pertains to processes for preparing tubulysin derivatives, conjugates of tubulysins, and intermediates therefore. In one illustrative embodiment of the invention, processes for derivatives or analogs of natural tubulysins including compounds of formula (T). In another embodiment, vitamin receptor binding conjugates of tubulysins are described. The processes include one or more steps described herein. In another embodiment, a process is described for preparing a compound of formula B, wherein R5 and R6 are as described in the various embodiments herein, such as each being independently selected from optionally substituted alkyl or optionally substituted cycloalkyl; and R8 is C1-C6 n-alkyl; wherein the process comprises the step of treating a compound of formula A with a silylating agent, such as triethylsilyl chloride, and a base, such as imidazole in an aprotic solvent.Type: GrantFiled: March 29, 2013Date of Patent: November 29, 2016Assignee: Endocyte, Inc.Inventors: Iontcho Radoslavov Vlahov, Hari Krishna R. Santhapuram, Paul Joseph Kleindl, Christopher Paul Leamon, Fei You
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Patent number: 9499849Abstract: Tubulysins are a series of naturally occurring cytotoxic agents that are of interest as anticancer therapeutic agents. Processes and intermediates useful for preparing naturally occurring and non-naturally occurring tubulysins and analogs and derivatives thereof are described.Type: GrantFiled: February 26, 2016Date of Patent: November 22, 2016Assignee: Endocyte, Inc.Inventors: Iontcho Radoslavov Vlahov, Michael Groaning, Paul Joseph Kleindl, Hari Krishna R. Santhapuram, Fei You, Kevin Yu Wang, Le-Cun Xu, Katheryn Marie Stanford, Allen Ritter, Christopher Paul Leamon
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Patent number: 9273091Abstract: Tubulysins are a series of naturally occurring cytotoxic agents that are of interest as anticancer therapeutic agents. Processes and intermediates useful for preparing naturally occurring and non-naturally occurring tubulysins and analogs and derivatives thereof are described.Type: GrantFiled: October 20, 2014Date of Patent: March 1, 2016Assignee: Endocyte, Inc.Inventors: Iontcho Radoslavov Vlahov, Michael Groaning, Paul Joseph Kleindl, Hari Krishna R. Santhapuram, Fei You, Kevin Yu Wang, Le-Cun Xu, Katheryn Marie Stanford, Allen Ritter, Christopher Paul Leamon
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Patent number: 9192682Abstract: Conjugates of antifolates, releasable linkers, and drugs, and pharmaceutical compositions containing them are described. The conjugates are useful for treating diseases arising from pathogenic cell populations. Methods for treating such diseases are also described.Type: GrantFiled: August 26, 2013Date of Patent: November 24, 2015Assignees: Endocyte, Inc., Purdue Research FoundationInventors: Christopher Paul Leamon, Iontcho Radoslavov Vlahov, Philip Stewart Low
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Patent number: 9187521Abstract: Processes are described for the preparation of tubulysins. The processes are useful for preparing predetermined mixtures of tubulysins, preparing single tubulysins from mixtures of tubulysins, and for converting one tubulysin into a different tubulysin. The tubulysins described herein are useful in treating diseases and disease states that include pathogenic cell populations.Type: GrantFiled: October 23, 2008Date of Patent: November 17, 2015Assignee: Endocyte, Inc.Inventors: Iontcho Radoslavov Vlahov, Christopher Paul Leamon, Yu Wang
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Patent number: 9138484Abstract: Described herein are compositions and methods for use in targeted drug delivery using cell receptor binding drug delivery conjugates containing hydrophilic spacer linkers for use in imaging, diagnosing, and/or treating diseases and disease states caused by pathogenic cell populations.Type: GrantFiled: June 25, 2008Date of Patent: September 22, 2015Assignee: Endocyte, Inc.Inventors: Christopher Paul Leamon, Iontcho Radoslavov Vlahov, Hari Krishna R. Santhapuram, Paul Joseph Kleindl, Yu Wang, Fei You
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Publication number: 20150225447Abstract: Tubulysins are a series of naturally occurring cytotoxic agents that are of interest as anticancer therapeutic agents. Processes and intermediates useful for preparing naturally occurring and non-naturally occurring tubulysins and analogs and derivatives thereof are described.Type: ApplicationFiled: October 20, 2014Publication date: August 13, 2015Applicant: ENDOCYTE, INC.Inventors: Iontcho Radoslavov VLAHOV, Michael GROANING, Paul Joseph KLEINDL, Hari Krishna R. SANTHAPURAM, Fei YOU, Kevin Yu WANG, Le-Cun XU, Katheryn Marie STANFORD, Allen RITTER, Christopher Paul LEAMON