Patents Assigned to Nektar Therapeutics
  • Patent number: 11111214
    Abstract: Provided are compounds of Formula I; and pharmaceutically acceptable salts and solvates thereof: The compounds of Formula I described herein relate to and/or have application(s) in (among others) the fields of drug discovery, pharmacotherapy, physiology, organic chemistry and polymer chemistry.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: September 7, 2021
    Assignee: Nektar Therapeutics
    Inventors: Neel K. Anand, Franco J. Duarte, Wen Zhang, Zhongxu Ren
  • Patent number: 11111335
    Abstract: Methods for preparing water soluble, non-peptidic polymers carrying carboxyl functional groups, particularly carboxylic acid functionalized poly(ethylene glycol) (PEG) polymers are disclosed, as are the products of these methods. In general, an ester reagent R(C?O)OR?, wherein R? is a tertiary group and R comprises a functional group X, is reacted with a water soluble, non-peptidic polymer POLY-Y, where Y is a functional group which reacts with X to form a covalent bond, to form a tertiary ester of the polymer, which is then treated with a strong base in aqueous solution, to form a carboxylate salt of the polymer. Typically, this carboxylate salt is then treated with an inorganic acid in aqueous solution, to convert the carboxylate salt to a carboxylic acid, thereby forming a carboxylic acid functionalized polymer.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: September 7, 2021
    Assignee: Nektar Therapeutics
    Inventors: J. Milton Harris, Antoni Kozlowski, Lihong Guo
  • Patent number: 11091525
    Abstract: Conjugates of an interleukin-2 (“IL-2”) moiety and one or more nonpeptidic, water-soluble polymers are provided. Typically, the non-peptidic, water-soluble polymer is poly(ethylene glycol) or a derivative thereof. Also provided, among other things, are compositions comprising conjugates, methods of making conjugates, methods of administering compositions to an individual, nucleic acid sequences, expression systems, host cells, and methods for preparing IL-moieties.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: August 17, 2021
    Assignee: Nektar Therapeutics
    Inventors: Jicai Huang, Yujun Wang
  • Patent number: 11033631
    Abstract: The invention provides various methods comprising the administration of a CYP2D6 bioactive drug covalently bound to a water-soluble oligomer. Metabolism of CYP2D6 bioactive drug conjugates is diverted from CYP2D6 to alternative pathways, and the conjugates may therefore be utilized to alleviate the problems associated with interpopulation variation resulting from the genetic polymorphism in the CYP2D6 gene.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: June 15, 2021
    Assignee: Nektar Therapeutics
    Inventors: Michael A. Eldon, C. Simone Jude-Fishburn, Hema Gursahani, Myong Gyong Lee
  • Patent number: 11007270
    Abstract: The invention relates to (among other things) polymer-semaxanib moiety conjugates and related compounds. A compound of the invention, when administered by any of a number of administration routes, exhibits advantages over the semaxanib moiety in unconjugated form.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: May 18, 2021
    Assignee: Nektar Therapeutics
    Inventors: Jennifer Riggs-Sauthier, Stephanie Allums-Donald, Sean M. Culbertson
  • Patent number: 10960079
    Abstract: Conjugates of an interleukin-2 (“IL-2”) moiety and one or more nonpeptidic, water-soluble polymers are provided. Typically, the non-peptidic, water-soluble polymer is poly(ethylene glycol) or a derivative thereof. Also provided, among other things, are compositions comprising conjugates, methods of making conjugates, methods of administering compositions to an individual, nucleic acid sequences, expression systems, host cells, and methods for preparing IL-moieties.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: March 30, 2021
    Assignee: Nektar Therapeutics
    Inventors: Mary J. Bossard, Cherie F. Ali, Xiaofeng Liu, Deborah H. Charych, Yujun Wang
  • Patent number: 10945972
    Abstract: The present invention relates to active substances in particulate form, to methods for preparing them and to their uses. The present invention provides particulate powders, such as might be of use for delivery using a dry powder inhaler (DPI) or similar delivery device, having properties which may be beneficial to the DPI delivery process.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: March 16, 2021
    Assignee: Nektar Therapeutics
    Inventors: Peter York, Boris Yu Shekunov, Mahboob Ur Rehman, Jane Catherine Feeley
  • Patent number: 10941248
    Abstract: The present invention provides, among other things, compounds that include a water-soluble and non-peptidic polymer as well as a maleimidyl group. The compounds are useful as, among other things, polymeric reagents.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: March 9, 2021
    Assignee: Nektar Therapeutics
    Inventors: Samuel P. McManus, Antoni Kozlowski, J. Milton Harris
  • Patent number: 10894087
    Abstract: Among other aspects, provided herein are multi-arm polymeric prodrug conjugates of cabazitaxel-based compounds. Methods of preparing such conjugates as well as methods of administering the conjugates are also provided. Upon administration to a patient, release of the cabazitaxel-based compound is achieved.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: January 19, 2021
    Assignee: Nektar Therapeutics
    Inventor: Antoni Kozlowski
  • Patent number: 10881738
    Abstract: The invention provides small molecule drugs that are chemically modified by covalent attachment of a water-soluble oligomer. A conjugate of the invention, when administered by any of a number of administration routes, exhibits a different biological membrane crossing rate as compared to the biological membrane crossing rate of the small molecule drug not attached to the water-soluble oligomer.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: January 5, 2021
    Assignee: Nektar Therapeutics
    Inventors: Jennifer Riggs-Sauthier, Franco J. Duarte, Aaron S. Hammons
  • Patent number: 10869933
    Abstract: The invention relates to (among other things) oligomer-phenothiazine conjugates and related compounds. A conjugate of the invention, when administered by any of a number of administration routes, exhibits advantages over un-conjugated phenothiazine compounds.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: December 22, 2020
    Assignee: Nektar Therapeutics
    Inventors: Xuyuan Gu, Jennifer Riggs-Sauthier
  • Patent number: 10865186
    Abstract: Provided are compounds, including those of Formula I; and pharmaceutically acceptable salts and solvates thereof. The compounds described herein relate to and/or have application(s) in (among others) the fields of drug discovery, pharmacotherapy, physiology, organic chemistry and polymer chemistry.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: December 15, 2020
    Assignee: Nektar Therapeutics
    Inventors: Franco J. Duarte, Neel K. Anand, Pankaj Sharma, Devendrapratap Singh
  • Patent number: 10844076
    Abstract: The instant disclosure relates to (among other things) compounds that are derivatives of 6-(2,3-dichlorophenyl)-1,2,4-triazin-5-amine. The compounds provided possess unique effects and differences over other phenyltriazines known in the art.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: November 24, 2020
    Assignee: Nektar therapeutics
    Inventors: Pankaj Sharma, Vijay Kumar Khatri, Xuyuan Gu, Yuan Song, Michael Lixin Shen, Jennifer Riggs-Sauthier, Neel K. Anand, Antoni Kozlowski, Aleksandrs Odinecs, Timothy A. Riley, Zhongxu Ren, YongQi Mu, Xiaoming Shen, Xuejun Yuan, Natalia Aurrecoechea, Donogh John Roger O'Mahony, Bo-Liang Deng
  • Patent number: 10806794
    Abstract: Provided herein (among other things) are protease inhibitor compounds having enhanced features, along with methods for administering such compounds. For example, the subject compounds can be administered without concomitant administration of a CYP3A4 inhibitor, have increased therapeutic index and/or increased potency, and are low-resistance inducing in nature.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: October 20, 2020
    Assignee: Nektar Therapeutics
    Inventors: C. Simone Jude-Fishburn, Laurie A. VanderVeen, Timothy A. Riley
  • Patent number: 10798955
    Abstract: Embodiments of the invention provide a composition of a particulate coformulation which includes particles containing an active substance and an additive, wherein each particle contains a relative additive concentration increasing radially outwards from a particle center to a particle surface along a finite gradient. In one example, the particle surface is an additive-rich surface without a distinct physical boundary between the particle center and the particle surface. The relative additive concentration may have a continuous rate of change across the finite gradient. In some examples, an active substance:additive ratio of the particle surface is sufficiently low to form a protective surface layer around the active substance. Generally, the particle surface is free of the active substance.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: October 13, 2020
    Assignee: Nektar Therapeutics
    Inventors: Mazen H. Hanna, Peter York
  • Patent number: 10786552
    Abstract: The invention relates to (among other things) a method of administering to a patient suffering from a cancer, the method comprising the steps of: (a) administering an IL-2R?-activating amount of a long acting, IL-2R?-selective agonist; and (b) administering a CTLA-4 pathway-inhibiting amount of an anti-CTLA-4 antibody or a PD-1 pathway-inhibiting amount of an anti-PD-1 antibody.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: September 29, 2020
    Assignee: Nektar Therapeutics
    Inventors: Murali Krishna Addepalli, Deborah H. Charych, Seema Kantak, Steven Robert Lee
  • Patent number: 10774181
    Abstract: The invention is directed to multi-functional N-maleimidyl polymer derivatives comprising a water soluble and non-peptidic polymer backbone having a terminal carbon, such as a poly(alkylene glycol), the terminal carbon of the polymer backbone being directly bonded to the nitrogen atom of a N-maleimidyl moiety without a linking group therebetween. The invention also provides two methods of preparing such linkerless N-maleimidyl polymer derivatives.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: September 15, 2020
    Assignee: Nektar Therapeutics
    Inventor: Xiaoming Shen
  • Patent number: 10766864
    Abstract: The present invention relates to compounds and their use as ligands for mu opioid receptors. Also included are methods for preparing the compounds and pharmaceutical compositions containing the compounds. In one or more embodiments of the invention, a compound according to Formula I is provided: and pharmaceutically acceptable salts thereof, wherein R1-R11 are as described herein.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: September 8, 2020
    Assignee: Nektar Therapeutics
    Inventors: Neel K. Anand, Natalia Aurrecoechea, Lin Cheng, Bo-Liang Deng, Donogh John Roger O'Mahony, YongQi Mu, Erik Krogh-Jespersen
  • Patent number: 10759906
    Abstract: Provided herein are polymeric ?-hydroxy aldehyde or ?-hydroxy ketone reagents which can be conjugated to amine-containing compounds to form stable conjugates in a single-step reaction. In selected embodiments, the polymeric reagent itself incorporates an internal proton-abstracting (basic) functional group, to promote more efficient reaction. The substituent is appropriately situated, via a linker if necessary, to position the group for proton abstraction, preferably providing a 4- or 5-bond spacing between the abstracting atom and the hydrogen atom on the ?-carbon. Also provided are methods of using the reagents and stable, solubilized conjugates of the reagents with biologically active compounds. In preferred embodiments, the polymeric component of the reagent or conjugate is a polyethylene glycol.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: September 1, 2020
    Assignee: Nektar Therapeutics
    Inventors: Sean M. Culbertson, Xiaoming Shen, Antoni Kozlowski, Samuel P. McManus
  • Patent number: 10736969
    Abstract: Among other aspects, provided herein are multi-arm polymeric prodrug conjugates of pemetrexed-based compounds. Methods of preparing such conjugates as well as methods of administering the conjugates are also provided. Upon administration to a patient, release of the pemetrexed-based compound is achieved.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: August 11, 2020
    Assignee: Nektar Therapeutics
    Inventors: Lin Cheng, Jennifer Riggs-Sauthier