Patents Examined by Olik Chudhuri
  • Methods and compositions for reduction of drag in hydrocarbon fluids
    Patent number: 4983186
    Abstract: A method for reducing friction loss in flowing hydrocarbon fluids is disclosed. The method comprises adding to the fluid an effective amount of an oil-soluble polyamine and a terpolymer of styrene, alkyl acrylate and a carboxylic acid selected from the group consisting of acrylic acid and methacrylic acid. Related compositions are also disclosed.
    Type: Grant
    Filed: July 18, 1989
    Date of Patent: January 8, 1991
    Assignee: Petrolite Corporation
    Inventors: Michael I. Naiman, James C. Chang