Patents by Inventor Adrian C. Maldonado

Adrian C. Maldonado 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).

  • Method of making thin-film composite membranes
    Patent number: 5358745
    Abstract: A thin-film seimpermeable composite membrane employs the reaction product of N-alkyl phenylenediamine or N,N'-dialkyl phenylenediamine and a poly acyl halide, such as trimesoyl chloride. Preferably the membrane is post-treated with an acid solution followed by an aqueous solution of polyvinyl alcohol and a buffer and/or base to improve its physical properties.
    Type: Grant
    Filed: April 27, 1993
    Date of Patent: October 25, 1994
    Assignee: Fluid Systems Corporation
    Inventors: Chinh N. Tran, Adrian C. Maldonado, Ratnasamy Somanathan
  • Thin-film composite membrane
    Patent number: 5234598
    Abstract: A thin-film seimpermeable composite membrane employs the reaction product of N-alkyl phenylenediamine or N,N'-dialkyl phenylenediamine and a poly acyl halide, such as trimesoyl chloride. Preferably the membrane is post-treated with an acid solution followed by an aqueous solution of polyvinyl alcohol and a buffer and/or base to improve its physical properties.
    Type: Grant
    Filed: May 13, 1992
    Date of Patent: August 10, 1993
    Assignee: Allied-Signal Inc.
    Inventors: Chinh N. Tran, Adrian C. Maldonado, Ratnasamy Somanathan