Patents by Inventor Vincent Rowan

Vincent Rowan 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).

  • Interpolymers for barium sulphate inhibition
    Patent number: 4937002
    Abstract: The present invention provides a method for treating aqueous systems to reduce or prevent the deposition of barium sulphate and other insoluble sulphates therein, comprising the addition to the water of an effective amount of an interpolymer of an ethylenically polymerizable carboxylic acid, and at least one of an ethylenically polymerizable dicarboxylic acid or other copolymerizable comonomer. The polymers are particularly effective in preventing scale precipitate at high levels of barium (e.g. 700 ppm) and under low pH conditions.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: June 26, 1990
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Peter Bainbridge, Vincent Rowan