Patents by Inventor Hoover B. Chew

Hoover B. Chew 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).

  • Branched and star-branched styrene polymers, telomers, and adducts, their synthesis, their bromination, and their uses
    Patent number: 8476373
    Abstract: New branched or star-branched styrene polymeric, telomeric, and monomeric product distributions, their preparation, their use as raw materials for bromination to produce flame retardants, the flame retardants themselves, and their use as flame retardants in various polymeric substrates are described.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: July 2, 2013
    Assignee: Albemarle Corporation
    Inventors: William J. Layman, Jr., Charles H. Kolich, Arthur G. Mack, Jonathan P. McCarney, Govindarajulu Kumar, Jorge Morice, Zhongxin Ge, Bo Liu, Douglas W. Luther, Kimberly M. White, Junzuo Wang, Ravindra R. Joshi, Hoover B. Chew
  • PHOSPHORUS FLAME RETARDANTS AND APPLICATIONS THEREFOR
    Publication number: 20110237144
    Abstract: This invention relates to a phosphorus flame retardant composition formed from bringing together components comprising: a) a cyclic phosphanate flame retardant comprising (5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphorinan-5-yl)methyl methyl ester of P-alkylphosphonic acid, and bis[(5-ethyl-2-methyI-2-oxido-1,3,2-dioxaphosphorinan-5-yl)methyl]ester of P-alkylphosphonic acid; and b) an alkylated triaryl phosphate ester flame retardant having a triphenyl phosphate (TTP) content of less than about 1 wt % based on the total weight of the alkylated triaryl phosphate ester. This invention further relates to the use of this phosphorus flame retardant composition especially for in polyurethane foams and textile applications.
    Type: Application
    Filed: December 8, 2009
    Publication date: September 29, 2011
    Applicant: ALBEMARLE CORPORATION
    Inventors: Hoover B. Chew, William J. Layman, JR., Arthur G. Mack, Ravindra R. Joshi
  • Branched and Star-Branched Styrene Polymers, Telomers, and Adducts, Their Synthesis, Their Bromination, and Their Uses
    Publication number: 20110224320
    Abstract: New branched or star-branched styrene polymeric, telomeric, and monomeric product distributions, their preparation, their use as raw materials for bromination to produce flame retardants, the flame retardants themselves, and their use as flame retardants in various polymeric substrates are described.
    Type: Application
    Filed: November 30, 2009
    Publication date: September 15, 2011
    Applicant: ALBEMARLE CORPORATION
    Inventors: William J. Layman, JR., Charles H. Kolich, Arthur G. Mack, Jonathan P. McCarney, Govindarajulu Kumar, Junzuo Wang, Jorge Morice, Zhongxin Ge, Bo Liu, Ravindra R. Joshi, Hoover B. Chew, Douglas W. Luther, Kimberly M. White
  • FLAME RETARDED RIGID POLYURETHANE FOAMS AND RIGID POLYURETHANE FOAM FORMULATIONS
    Publication number: 20110130476
    Abstract: The present invention relates to flame retarded polyurethane or polyisocyanurate foam formulations, flame retardant additives suitable for use therein, and flame retarded foams made therefrom.
    Type: Application
    Filed: August 6, 2008
    Publication date: June 2, 2011
    Applicant: Albemarle Corporation
    Inventors: Hoover B. Chew, Ravindra R. Joshi, Arthur G. Mack, Augusto C. Ibay
  • FLAME RETARDED FLEXIBLE POLYURETHANE FOAMS AND FLEXIBLE POLYURETHANE FOAM FORMULATIONS
    Publication number: 20100298454
    Abstract: The present invention relates to flame retarded flexible polyurethane foam formulations, flame retardant additives suitable for use therein, and flame retarded foams made therefrom.
    Type: Application
    Filed: August 6, 2008
    Publication date: November 25, 2010
    Inventors: Hoover B. Chew, Ravindra R> Joshi, Arthur G. Mack
  • Flame Retardant Additive Compositions and Use Thereof
    Publication number: 20090143494
    Abstract: Improved flame retardant additives are formed from (A) at least one bis(alkanoic acid ester) of a ring-brominated aromatic diester diol; (B) liquid alkylated triphenyl phosphate having an approximate average formula (RxPhO)3P?O) in which each R is, independently, a hydrogen atom or a C14 alkyl group and x is an average number in the range of about 0.2 to 3; and (C) at least one alicyclic phosphonate ester having 1, 2 or 3 phosphorus atoms in the molecule, at least one of which is part of an alicyclic ring system, and having a phosphorus content of at least about 15 wt %. Combinations of these components are well-suited for use in various polymers or resins, especially polyurethanes.
    Type: Application
    Filed: April 3, 2007
    Publication date: June 4, 2009
    Applicant: ALBEMARLE CORPORATION
    Inventors: Arthur G. Mack, Hoover B. Chew