Patents by Inventor Muttalif Duong

Muttalif Duong 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).

  • Water-soluble post branched cationic acrylamide polymers and use thereof
    Patent number: 8597467
    Abstract: A cationic copolymer is obtained by the Hofmann rearrangement (also referred to as the Hofmann degradation reaction) in aqueous solution in the presence of an alkaline-earth and/or alkali hydroxide and an alkaline-earth and/or alkaline hypohalide, on a base copolymer comprising at least one nonionic monomer selected from the group comprising acrylamide (and/or methacrylamide), N,N-dimethylacrylamide and/or acrylonitrile The copolymer is branched after the Hofmann rearrangement, in the presence of at least one polyfunctional branching agent, and is soluble in water.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: December 3, 2013
    Assignee: S.P.C.M. SA
    Inventors: Christian Jehn-Rendu, Rene Hund, Muttalif Duong
  • WATER-SOLUBLE POST BRANCHED CATIONIC ACRYLAMIDE POLYMERS AND USE THEREOF
    Publication number: 20100186914
    Abstract: A cationic copolymer is obtained by the Hofmann rearrangement (also referred to as the Hofmann degradation reaction) in aqueous solution in the presence of an alkaline-earth and/or alkali hydroxide and an alkaline-earth and/or alkaline hypohalide, on a base copolymer comprising at least one nonionic monomer selected from the group comprising acrylamide (and/or methacrylamide), N,N-dimethylacrylamide and/or acrylonitrile The copolymer is branched after the Hofmann rearrangement, in the presence of at least one polyfunctional branching agent, and is soluble in water.
    Type: Application
    Filed: July 11, 2008
    Publication date: July 29, 2010
    Applicant: SNF SAS
    Inventors: Christian Jehn-Rendu, Rene Hund, Muttalif Duong