Patents by Inventor Michael J. Howdeshell

Michael J. Howdeshell 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 clarifying oily waste water
    Patent number: 7431845
    Abstract: A method of clarifying oily waste water comprising adding to the waste water an effective clarifying amount of one or more demulsifiers selected from the group consisting of dendritic polyamines, dendritic polyamidoamines and hyperbranched polyethyleneimines and the reaction products thereof with gluconolactone, alkylene oxides, salts of 3-chloro-2-hydroxypropanesulfonic acid, alkyl halides, benzyl halides and dialkyl sulfates.
    Type: Grant
    Filed: June 23, 2005
    Date of Patent: October 7, 2008
    Assignee: Nalco Company
    Inventors: Maria B. Manek, Michael J. Howdeshell, Kirk E. Wells, Hester A. Clever, William K. Stephenson