Patents by Inventor Kaj D. Rondum

Kaj D. Rondum 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 removing iron oxide deposit from a metal surface in contact with an aqueous system
    Publication number: 20030086816
    Abstract: This invention relates to a process for removing iron oxide deposit from a metal surface in contact with an aqueous system, in particular the metal surface of a boiler operating at high pressures. The process comprises adding an elevated dosage of an oxime to the aqueous system in an amount effective to partially or entirely remove iron oxide deposits from the metal surface.
    Type: Application
    Filed: June 20, 2002
    Publication date: May 8, 2003
    Inventors: Douglas B. Dewitt-Dick, Kaj D. Rondum
  • Process for dispersing iron oxide in steam generating boilers
    Patent number: 6337047
    Abstract: This invention relates to a process for dispersing corrosion products, specifically iron oxide, in steam generating boilers. Improved dispersion is achieved by adding a dispersant to a feedpoint of the steam generating boiler where the composition comprises: (a) a copolymer of sulfonated styrene and maleic anhydride or maleic acid; and (b) diethylenetriamine penta (methylene phosphonic acid).
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: January 8, 2002
    Assignee: Ashland Inc.
    Inventors: Kostan B. Charkhutian, Bruce L. Libutti, Kaj D. Rondum
  • Method for inhibiting foulant formation in a non-aqueous process stream
    Patent number: 5243063
    Abstract: A method for inhibiting fouling in an organic process stream which is substantially non-aqueous by the addition of certain oxime compounds.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: September 7, 1993
    Assignee: Ashchem I.P., Inc.
    Inventors: Guy A. Devicaris, Kaj D. Rondum, Dwight E. Emerich
  • Method for inhibiting foulant formation in organic streams using erythorbic acid or oximes
    Patent number: 5213678
    Abstract: A method for inhibiting fouling in an organic process stream by adding certain oximes, hydrazine, erythorbic acid, carbohydrazide, or mixtures thereof. The antifoulant is added to the organic stream as an aqueous solution.
    Type: Grant
    Filed: February 8, 1991
    Date of Patent: May 25, 1993
    Assignee: Ashchem I.P., Inc.
    Inventors: Kaj D. Rondum, Guy A. DeVicaris, Dwight E. Emerich