Patents by Inventor Justin W. Chan

Justin W. Chan 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).

  • Preparation of sulfonated naphthalene polyoxadiazoles polymers
    Patent number: 9150693
    Abstract: Described is the preparation of sulfonated polyoxadiazole polymers with a high degree of sulfonation and good flammability properties. The polymers are useful in articles such as fibers.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: October 6, 2015
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Peter A Brown, Justin W. Chan, Michael W Cobb, Sharlene Renee Williams
  • Sulfonated aromatic polyesters
    Patent number: 9150789
    Abstract: The invention is directed to sulfonated aromatic polyesters and methods of making said polymers. These polymers are useful as fibers and other articles. The polymer has a property of increased flame retardancy.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: October 6, 2015
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Justin W. Chan, Michael W Cobb, Surbhi Mahajan, Sharlene Renee Williams
  • Sulfonated aromatic compounds
    Patent number: 9150506
    Abstract: Described are sulfonated aromatic compounds and methods of making said compounds. The compounds are useful as monomers in a variety of polymers such as polyamides and polyesters, and can impart flame resistant properties.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: October 6, 2015
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Justin W. Chan, Michael W Cobb, Sharlene Renee Williams
  • FURAN BASED POLYAMIDES
    Publication number: 20150044927
    Abstract: Disclosed herein are compositions and article made therefrom and processes of making them. The composition comprises a polymer, the polymer comprising a repeat unit of formula shown below: wherein the polymer is derived from an aromatic diamine comprising m-phenylene diamine, and an aromatic diacid or a derivative thereof comprising furan dicarboxylic acid or derivative thereof.
    Type: Application
    Filed: March 29, 2013
    Publication date: February 12, 2015
    Applicant: E I Du Pont DE Nemours and Company
    Inventors: Justin W. Chan, Fredrik Nederberg, Bhuma Rajagopalan, Sharlene Renee Williams, Michael W. Cobb
  • PREPARATION OF SULFONATED NAPHTHALENE POLYOXADIAZOLES POLYMERS
    Publication number: 20130338335
    Abstract: Described is the preparation of sulfonated polyoxadiazole polymers with a high degree of sulfonation and good flammability properties. The polymers are useful in articles such as fibers.
    Type: Application
    Filed: June 12, 2013
    Publication date: December 19, 2013
    Inventors: Peter A. Brown, Justin W. Chan, Michael W. Cobb, Sharlene Renee Williams
  • SULFONATED AROMATIC POLYESTERS
    Publication number: 20130338332
    Abstract: The invention is directed to sulfonated aromatic polyesters and methods of making said polymers. These polymers are useful as fibers and other articles. The polymer has a property of increased flame retardancy.
    Type: Application
    Filed: June 12, 2013
    Publication date: December 19, 2013
    Inventors: Justin W. Chan, Michael W. Cobb, Surbhi Mahajan, Sharlene Renee Williams
  • SULFONATED AROMATIC COMPOUNDS
    Publication number: 20130338376
    Abstract: Described are sulfonated aromatic compounds and methods of making said compounds. The compounds are useful as monomers in a variety of polymers such as polyamides and polyesters, and can impart flame resistant properties.
    Type: Application
    Filed: June 12, 2013
    Publication date: December 19, 2013
    Inventors: JUSTIN W. CHAN, MICHAEL W. COBB, SHARLENE RENEE WILLIAMS
  • SULFONATED POLYOXADIAZOLE POLYMERS ARTICLES
    Publication number: 20130212780
    Abstract: A shaped article having a polymer having repeat units of Formula (I) and one or both of Formula (II) and (IIa): wherein M is a cation.
    Type: Application
    Filed: December 5, 2011
    Publication date: August 22, 2013
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Justin W. Chan, Michael W. Cobb, John Henry Henry McMinn, Sharlene Renee Williams