Patents by Inventor Yu Li Angell

Yu Li Angell 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).

  • DOPO derivative flame retardants
    Patent number: 9522927
    Abstract: The present invention relates to novel, halogen-free flame retardant derived from 9,10-Dihydro-9-Oxa-10-Phosphaphenantrene-10-oxide (DOPO). This invention also relates to the use of the halogen free DOPO derived flame retardant in polymers.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: December 20, 2016
    Assignee: Albemarle Corporation
    Inventors: Yu Li Angell, Kimberly M. White, Scott E. Angell, Arthur G. Mack
  • BUTADIEN2,3-DIYL LINKED DI-DOPO DERIVATIVES AS FLAME RETARDANTS
    Publication number: 20160060281
    Abstract: Disclosed are novel, halogen-free flame-retardants derived from 9,10-Dihydro-9-Oxa-10-Phosphaphenantrene-10-oxide (DOPO) of the structure below: This invention also relates to the use of the halogen free DOPO derived compositions as flame-retardants in polymers, and a process of preparing the above compounds by reacting a formula A compound with a formula B compound:
    Type: Application
    Filed: May 2, 2014
    Publication date: March 3, 2016
    Inventors: Scott Edward Angell, Kimberly A. White, Yu Li Angell, Arthur G. Mack
  • DOPO DERIVATIVE FLAME RETARDANTS
    Publication number: 20140357885
    Abstract: The present invention relates to novel, halogen-free flame retardant derived from 9,10-Dihydro-9-Oxa-10-Phosphaphenantrene-10-oxide (DOPO). This invention also relates to the use of the halogen free DOPO derived flame retardant in polymers.
    Type: Application
    Filed: August 20, 2014
    Publication date: December 4, 2014
    Inventors: YU LI ANGELL, KIMBERLY M. WHITE, SCOTT E. ANGELL, ARTHUR G. MACK
  • DOPO-derived flame retardant and epoxy resin composition
    Patent number: 8536256
    Abstract: This invention relates to 9,10-Dihydro-9-Oxa-10-Phosphaphenantrene-10-oxide derived additive flame-retardants, which are useful in epoxy resin compositions. The epoxy resin compositions may be used in making prepregs or laminates for printed wiring boards and composite materials.
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: September 17, 2013
    Assignee: Albemarle Corporation
    Inventors: Kimberly M. White, Yu Li Angell, Scott E. Angell, Arthur G. Mack
  • DOPO-DERIVED FLAME RETARDANT AND EPOXY RESIN COMPOSITION
    Publication number: 20120055705
    Abstract: This invention relates to 9,10-Dihydro-9-Oxa-10-Phosphaphenantrene-10-oxide derived additive flame-retardants, which are useful in epoxy resin compositions. The epoxy resin compositions may be used in making prepregs or laminates for printed wiring boards and composite materials.
    Type: Application
    Filed: May 19, 2010
    Publication date: March 8, 2012
    Applicant: Albemarle Corporation
    Inventors: Kimberly M. White, Yu Li Angell, Scott E. Angell, Arthur G. Mack
  • DOPO DERIVATIVE FLAME RETARDANTS
    Publication number: 20120053265
    Abstract: The present invention relates to novel, halogen-free flame retardant derived from 9,10-Dihydro-9-Oxa-10-Phosphaphenantrene-10-oxide (DOPO). This invention also relates to the use of the halogen free DOPO derived flame retardant in polymers.
    Type: Application
    Filed: May 19, 2010
    Publication date: March 1, 2012
    Applicant: ALBEMARLE CORPORATION
    Inventors: Yu Li Angell, Kimberly M. White, Scott E. Angell, Arthur G. Mack