Patents Assigned to Nektar Therapeutics
  • Publication number: 20070042048
    Abstract: According to the subject invention, dispersible dry powder pharmaceutical-based compositions are provided, including methods for their manufacture and dry powder dispersion devices. A dispersible dry powder pharmaceutical-based composition is one having a moisture content of less than about 10% by weight (% w) water, usually below about 5% w and preferably less than about 3% w; a particle size of about 1.0-5.0 ?m mass median diameter (MMD), usually 1.0-4.0 ?m MMD, and preferably 1.0-3.0 ?m MMD; a delivered dose of about >30%, usually >40%, preferably >50%, and most preferred >60%; and an aerosol particle size distribution of about 1.0-5.0 ?m mass median aerodynamic diameter (MMAD), usually 1.5-4.5 ?m MMAD, and preferably 1.5-4.0 MMAD. Such composition are of pharmaceutical grade purity.
    Type: Application
    Filed: June 27, 2006
    Publication date: February 22, 2007
    Applicant: NEKTAR THERAPEUTICS
    Inventors: Robert Platz, John Patton, Linda Foster, Mohammed Eljamal
  • Patent number: 7172768
    Abstract: The present invention provides storage stable dry powder compositions of IL-4R. The powder compositions demonstrate superior chemical and physical stability over their solution counterparts, particularly upon storage under varying conditions of temperature and humidity. Moreover, the powders, as prepared, possess good aerosol properties, which are maintained upon storage.
    Type: Grant
    Filed: February 1, 2005
    Date of Patent: February 6, 2007
    Assignee: Nektar Therapeutics
    Inventors: Jayne Hastedt, Kirsten Cabot, David Gong, Dennis Hester
  • Publication number: 20070025956
    Abstract: Provided herein are water-soluble polymer conjugates and polymer-based compositions of non-steroidal anti-inflammatory drugs. Also provided are methods for synthesizing and administering such conjugates and compositions.
    Type: Application
    Filed: June 15, 2006
    Publication date: February 1, 2007
    Applicant: Nektar Therapeutics AL, Corporation
    Inventors: Kevin Burton, Xuan Zhao, Michael Bentley
  • Patent number: 7157546
    Abstract: The present invention is directed to alkanal derivatives of water-soluble polymers such as poly(ethylene glycol), their corresponding hydrates and acetals, and to methods for preparing and using such polymer alkanals. The polymer alkanals of the invention are prepared in high purity and exhibit storage stability.
    Type: Grant
    Filed: September 9, 2003
    Date of Patent: January 2, 2007
    Assignee: Nektar Therapeutics AL, Corporation
    Inventor: Antoni Kozlowski
  • Patent number: 7150766
    Abstract: The invention provides a method for forming particles of a target substance, comprising (a) co-introducing into a particle formation vessel, under controlled temperature and pressure, a supercritical or near-critical anti-solvent fluid; a first target substance in a first vehicle; and a second target substance in a second vehicle; and (b) using the anti-solvent to disperse the target substances in their respective vehicles and to extract the vehicles, substantially simultaneously and substantially immediately on introduction of the fluids into the particle formation vessel. The second vehicle is immiscible with the first, and contact between the first and second vehicles occurs a sufficiently short period of time before their dispersion by the anti-solvent, and with sufficient physical mixing, as to allow only insignificant, if any, phase separation to occur between the two vehicles between their contact with one another and their dispersion.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: December 19, 2006
    Assignee: Nektar Therapeutics UK, Ltd.
    Inventors: Mazen H. Hanna, Peter York
  • Patent number: 7141236
    Abstract: Methods and compositions for delivering macromolecules to or via the respiratory tract, such that the macromolecules exhibit improved local and/or systemic bioavailability are provided. Such methods utilize lipid-based microstructures formed in combination with at least one bioactive macromolecule, which have a superior ability to rapidly release the bioactive macromolecule(s) thereby resulting in improved local and/or systemic bioavailability of the bioactive macromolecule(s). Such improved bioavailability is believed to be due, in part, to reduction of scavenging by bronchoalveolar macrophages and/or mucociliary clearance.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: November 28, 2006
    Assignee: Nektar Therapeutics
    Inventors: Adrian I. Bot, Luis A. Dellamary, Dan J. Smith
  • Patent number: 7138141
    Abstract: A process for preparing ultrafine powders of biological macromolecules comprises atomizing liquid solutions of the macromolecules, drying the droplets formed in the atomization step, and collecting the particles which result from drying. By properly controlling each of the atomization, drying, and collection steps, ultrafine dry powder compositions having characteristics particularly suitable for pulmonary delivery for therapeutic and other purposes may be prepared.
    Type: Grant
    Filed: March 31, 2003
    Date of Patent: November 21, 2006
    Assignee: Nektar Therapeutics
    Inventors: Robert Platz, Thomas Brewer, Terrence Boardman
  • Publication number: 20060239960
    Abstract: Provided herein are water-soluble polymer conjugates and polymer-based compositions of antimicrobial agents. Also provided are methods for synthesizing and administering such conjugates and compositions.
    Type: Application
    Filed: April 11, 2006
    Publication date: October 26, 2006
    Applicant: Nektar Therapeutics AL, Corporation
    Inventors: Mary Bossard, Stacy Mitchell
  • Publication number: 20060239961
    Abstract: The present invention provides a water soluble, nonpeptidic polymer comprising two or more alkylene oxide-based oligomers linked together by hydrolytically degradable linkages such as carbonates. Typically, the oligomer portion of the polymer is an amphiphilic triblock copolymer having a central propylene oxide block or butylene oxide block positioned between two ethylene oxide blocks. The polymer can be hydrolytically degraded into oligomers under physiological conditions. In aqueous media, the polymer preferably forms thermally reversible, hydrolytically degradable hydrogels that can be used, for example, for drug delivery and related biomedical applications.
    Type: Application
    Filed: February 14, 2003
    Publication date: October 26, 2006
    Applicant: Nektar Therapeutics AL, Corporation
    Inventors: Michael Bentley, J. Harris, Xuan Zhao, William Battle, Siaoming Shen
  • Patent number: 7115280
    Abstract: Preparation of particles of an active substance having a layer of an additive at the particle surfaces, by dissolving both the active substance and the additive in a vehicle to form a target solution, and contacting the target solution with an anti-solvent fluid using a SEDS™ particle formation process, to cause the active substance and additive to coprecipitate. The additive is typically a protective additive, in particular a taste and/or odour masking agent. Also provided is a particulate coformulation made by the method, which has a finite gradient in the relative additive concentration, which concentration increases radially outwards from the active-rich core to the additive-rich surface of the particles.
    Type: Grant
    Filed: November 1, 2001
    Date of Patent: October 3, 2006
    Assignee: Nektar Therapeutics UK, Ltd.
    Inventors: Mazen H. Hanna, Peter York
  • Patent number: 7112341
    Abstract: Provided are stabilized follicle stimulating protein (FSP) dry powder compositions for aerosolized delivery to the deep lung, methods of preparing and administering such compositions, and methods for treating infertility involving administering the dry powders by pulmonary delivery to the deep lung.
    Type: Grant
    Filed: April 13, 2000
    Date of Patent: September 26, 2006
    Assignee: Nektar Therapeutics
    Inventors: Sudha Nagarajan, John S. Patton, David B. Bennett, Joanne Greene, Hi-Shi Chiang, Cheryl L. M. Stults, Geraldine Venthoye, Darrel LaVern Allen, Benjamin Lee Hughes, Mary Stiff-Torvik, Ronald Keith Wolff, William David Roeder
  • Patent number: 7101932
    Abstract: The invention provides a method for preparing a 1-benzotriazolylcarbonate ester of a water-soluble and non-peptidic polymer by reacting a terminal hydroxyl group of a water-soluble and non-peptidic polymer with di(1-benzotriazolyl)carbonate in the presence of an amine base and an organic solvent. The polymer backbone can be poly(ethylene glycol). The 1-benzotrialylcarbonate ester can then be reacted directly with a biologically active agent to form a biologically active polymer conjugate or reacted with an amino acid, such as lysine, to form an amino acid derivative.
    Type: Grant
    Filed: December 2, 2003
    Date of Patent: September 5, 2006
    Assignee: Nektar Therapeutics Al, Corporation
    Inventor: Antoni Kozlowski
  • Publication number: 20060194940
    Abstract: The present invention is directed to alkanal derivatives of water-soluble polymers such as poly(ethylene glycol), their corresponding hydrates and acetals, and to methods for preparing and using such polymer alkanals. The polymer alkanals of the invention are prepared in high purity and exhibit storage stability.
    Type: Application
    Filed: March 13, 2006
    Publication date: August 31, 2006
    Applicant: Nektar Therapeutics AL, Corporation
    Inventor: Antoni Kozlowski
  • Patent number: 7087197
    Abstract: Method for preparing a target substance in particulate form, comprising introducing into a particle formation vessel, through separate first and second fluid inlets respectively, (a) a “target solution/suspension” of the substance in a fluid vehicle and (b) a compressed fluid anti-solvent, and allowing the anti-solvent to extract the vehicle so as to form particles of the substance, wherein the anti-solvent fluid has a sonic, near-sonic or supersonic velocity as it enters the vessel, and wherein the anti-solvent and the target solution/suspension enter the vessel at different locations and meet downstream (in the direction of anti-solvent flow) of the second fluid inlet. Also provided is apparatus for use in such a method.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: August 8, 2006
    Assignee: Nektar Therapeutics
    Inventors: Srinivas Palakodaty, Andreas Kordikowski, Darren Gilbert
  • Publication number: 20060165606
    Abstract: A pulmonary delivery medicament comprises a plurality of particulates, the particulates comprising a structural matrix and a water insoluble and/or crystalline active agent. The particulates have a geometric diameter of 0.5 to 50 ?m. The water insoluble active agent can be a fungicide, antibiotic, budesonide. A method of making the medicament comprises forming a liquid feedstock, and forming a feedstock suspension by suspending in the liquid feedstock, the active agent and an excipient capable of forming a structural matrix, such as a phospholipid. The feedstock suspension is spray dried to produce the particulates.
    Type: Application
    Filed: December 22, 2005
    Publication date: July 27, 2006
    Applicant: Nektar Therapeutics
    Inventors: Thomas Tarara, Jeffrey Weers, Alexey Kabalnov, Ernest Schutt, Luis Dellamary
  • Publication number: 20060160871
    Abstract: One or more embodiments of the invention provide various novel formulations, and tablet dosage forms, comprising losartan that are non-crystalline, stable, and/or otherwise improvements over known losartan formulations. One or more embodiments of the invention further provide methods for preparing the formulation, methods for preparing the tablet dosage form, and to methods of administering the tablet dosage and/or formulation comprising losartan. The losartan-containing formulations may be administered to a user to treat hypertension, and related conditions.
    Type: Application
    Filed: December 6, 2005
    Publication date: July 20, 2006
    Applicant: Nektar Therapeutics
    Inventors: Srinivas Palakodaty, Jiang Zhang, Andreas Kordikowski, Linda Daintree, Sarma Duddu, Alan Kugler, Herm Snyder, David Lechuga-Ballesteros, Nagesh Palepu, Michael Eldon
  • Publication number: 20060159625
    Abstract: Formulations are provided for pulmonary administration of an antifungal agent to a patient. Methods of using the formulations in the treatment of antifungal infections are also provided, including treatment of pulmonary aspergillosis with amphotericin B-containing formulations. Methods of manufacturing the formulations to achieve optimum properties are provided as well.
    Type: Application
    Filed: July 22, 2005
    Publication date: July 20, 2006
    Applicant: Nektar Therapeutics
    Inventors: Thomas Tarara, Jeffry Weers, Michael Eldon, Rangachari Narashimhan, Andrew Clark
  • Publication number: 20060159629
    Abstract: A pulmonary delivery medicament comprises a plurality of particulates, each particulate having a perforated microstructure comprising a phospholipid structural matrix and active agent, the phospholipid structural matrix comprising greater than about 50% w/w phospholipid, and the particulates having a geometric diameter of from 0.5 to 50 ?m. The medicament can be made from a liquid feedstock having greater than about 20% w/w phospholipid with an added active agent, which is spray dried to produce the particulates.
    Type: Application
    Filed: December 22, 2005
    Publication date: July 20, 2006
    Applicant: Nektar Therapeutics
    Inventors: Thomas Tarara, Jeffry Weers, Alexey Kabalnov, Ernest Schutt, Luis Dellamary
  • Patent number: 7078496
    Abstract: The invention provides reagents and methods for conjugating a polymer specifically to the ?-amine of a polypeptide. The invention provides monofunctional, bifunctional, and multifunctional PEGs and related polymers having a terminal thioester moiety capable of specifically conjugating to the ?-amine of a polypeptide having a cysteine or histidine residue at the N-terminus. The invention provides reactive thioester-terminated PEG polymers that have suitable reactivity with an N-terminal cysteine or histidine residue of a polypeptide to produce an amide bond between the PEG molecule and the polypeptide.
    Type: Grant
    Filed: October 9, 2002
    Date of Patent: July 18, 2006
    Assignee: Nektar Therapeutics AL, Corporation
    Inventors: Michael J. Roberts, Zhihao Fang
  • Patent number: 7060259
    Abstract: Poly(ethylene glycol) carbamate derivatives useful as water-soluble prodrugs are disclosed. These degradable poly(ethylene glycol) carbamate derivatives also have potential applications in controlled hydrolytic degradation of hydrogels. In such degradable hydrogels, drugs may be trapped in the gel and released by diffusion as the gel degrades, or they may be covalently bound through hydrolyzable carbamate linkages. Hydrolysis of these carbamate linkages releases the drug at a controllable rate as the gel degrades.
    Type: Grant
    Filed: January 10, 2005
    Date of Patent: June 13, 2006
    Assignee: Nektar Therapeutics AL, Corporation
    Inventors: Michael D. Bentley, Xuan Zhao