Patents by Inventor John S. Ruffini

John S. Ruffini 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).

  • Process for inhibiting scale and fouling on the metal surfaces exposed to an aqeuous system
    Patent number: 6797177
    Abstract: This invention relates to a process for inhibiting scale and fouling on metal surfaces exposed to an aqueous system, particularly a circulating aqueous system. The process comprises adding glutamic acid N,N diacetic acid, or salts thereof, to the aqueous system. Glutamic acid N,N diacetic acid, or salts thereof, act as a chelating agent and is biodegradable. The process is particularly useful for inhibiting the formation of scale and fouling on metal surfaces of steam generating and cooling systems.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: September 28, 2004
    Assignee: Ashland Inc.
    Inventors: Kostan B. Charkhutian, Bruce L. Libutti, Frank L. M. De Cordt, John S. Ruffini
  • Process for inhibiting scale and fouling on the metal surfaces exposed to an aqeuous system
    Publication number: 20040011743
    Abstract: This invention relates to a process for inhibiting scale and fouling on metal surfaces exposed to an aqueous system, particularly a circulating aqueous system. The process comprises adding glutamic acid N,N diacetic acid, or salts thereof, to the aqueous system. Glutamic acid N,N diacetic acid, or salts thereof, act as a chelating agent and is biodegradable. The process is particularly useful for inhibiting the formation of scale and fouling on metal surfaces of steam generating and cooling systems.
    Type: Application
    Filed: July 18, 2002
    Publication date: January 22, 2004
    Inventors: Kostan B. Charkhutian, Bruce L. Libutti, Frank L. M. De Cordt, John S. Ruffini