Patents by Inventor Anthony O. Chong

Anthony O. Chong 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).

  • Acid salt forms of polymer-drug conjugates and alkoxylation methods
    Patent number: 9320808
    Abstract: Among other aspects, provided herein is a mixed-acid salt of a water-soluble polymer-drug conjugate, along with related methods of making and using the same. The mixed-salt acid salt is stably formed, and appears to be more resistant to hydrolytic degradation than the corresponding predominantly pure acid salt or free base forms of the polymer-drug conjugate. The mixed acid salt is reproducibly prepared and recovered, and provides surprising advantages over non-mixed acid salt forms of the water-soluble polymer drug conjugate.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: April 26, 2016
    Assignee: NEKTAR THERAPEUTICS
    Inventors: Anthony O. Chong, Seoju Lee, Bhalchandra V. Joshi, Brian Bray, Shaoyong Nie, Patrick L. Spence
  • Salt form of a multi-arm polymer-drug conjugate
    Patent number: 9226969
    Abstract: Among other aspects, provided herein is a hydrohalide salt of a multi-arm water-soluble polyethylene glycol-drug conjugate, along with related methods of making and using the same. The hydrohalide salt is stably formed, and appears to be more resistant to hydrolytic degradation than the corresponding free base form of the conjugate.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: January 5, 2016
    Assignee: Nektar Therapeutics
    Inventors: Anthony O. Chong, Seoju Lee, Bhalchandra V. Joshi, Brian Bray, Shaoyong Nie, Patrick L. Spence, Antoni Kozlowski, Samuel P. McManus, Sachin Tipnis, David Swallow, John R. Handley, Anthony G. Schaefer
  • ACID SALT FORMS OF POLYMER-DRUG CONJUGATES AND ALKOXYLATION METHODS
    Publication number: 20150105519
    Abstract: Among other aspects, provided herein is a mixed-acid salt of a water-soluble polymer-drug conjugate, along with related methods of making and using the same. The mixed-salt acid salt is stably formed, and appears to be more resistant to hydrolytic degradation than the corresponding predominantly pure acid salt or free base forms of the polymer-drug conjugate. The mixed acid salt is reproducibly prepared and recovered, and provides surprising advantages over non-mixed acid salt forms of the water-soluble polymer drug conjugate.
    Type: Application
    Filed: May 21, 2014
    Publication date: April 16, 2015
    Applicant: NEKTAR THERAPEUTICS
    Inventors: Anthony O. Chong, Seoju Lee, Bhalchandra V. Joshi, Brian Bray, Shaoyong Nie, Patrick L. Spence, Antoni Kozlowski, Samuel P. McManus, Sachin Tipnis, Greg Lavaty, David Swallow, John R. Handley, Anthony G. Schaefer
  • Salt Form of a Multi-Arm Polymer-Drug Conjugate
    Publication number: 20130231359
    Abstract: Among other aspects, provided herein is a hydrohalide salt of a multi-arm water-soluble polyethylene glycol-drug conjugate, along with related methods of making and using the same. The hydrohalide salt is stably formed, and appears to be more resistant to hydrolytic degradation than the corresponding free base form of the conjugate.
    Type: Application
    Filed: November 18, 2010
    Publication date: September 5, 2013
    Applicant: Nektar Therapeutics
    Inventors: Anthony O. Chong, Seoju Lee, Bhalchandra V. Joshi, Brian Bray, Shaoyong Nie, Patrick L. Spence, Antoni Kozlowski, Samuel P. McManus, Sachin Tipnis, Greg Lavaty, David Swallow, John R. Handley, Anthony G. Schaefer
  • Acid Salt Forms of Polymer-Drug Conjugates and Alkoxylation Methods
    Publication number: 20130143909
    Abstract: Among other aspects, provided herein is a mixed-acid salt of a water-soluble polymer-drug conjugate, along with related methods of making and using the same. The mixed-salt acid salt is stably formed, and appears to be more resistant to hydrolytic degradation than the corresponding predominantly pure acid salt or free base forms of the polymer-drug conjugate. The mixed acid salt is reproducibly prepared and recovered, and provides surprising advantages over non-mixed acid salt forms of the water-soluble polymer drug conjugate.
    Type: Application
    Filed: November 18, 2010
    Publication date: June 6, 2013
    Applicant: Nektar Therapeutics
    Inventors: Anthony O. Chong, Seoju Lee, Bhalchandra V. Joshi, Brian Bray, Shaoyong Nie, Patrick L. Spence, Antoni Kozlowski, Samuel P. McManus, Sachin Tipnis, Greg Lavaty, David Swallow, John R. Handley, Anthony G. Schaefer