Patents by Inventor Hester Clever

Hester Clever 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
  • Method of clarifying oily waste water
    Publication number: 20060289359
    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: Application
    Filed: June 23, 2005
    Publication date: December 28, 2006
    Inventors: Maria Manek, Michael Howdeshell, Kirk Wells, Hester Clever, William Stephenson
  • Shortstop agents for vinyl polymerizations
    Patent number: 5880230
    Abstract: The present invention relates to a method of terminating a free-radical initiated emulsion polymerization by utilizing a shortstopping agent that contains a stable nitroxyl free-radical or is capable of forming a stable nitroxyl free radical in situ. Besides more effective stopping of polymerization, the present invention does not contain nitrosamine precursors nor is the shortstop agent easily removed during latex and polymer processing.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: March 9, 1999
    Assignee: Nalco/Exxon Energy Chemicals, L.P.
    Inventors: Allen R. Syrinek, Hester A. Clever
  • Antifoulant for acrylic acid purification
    Patent number: 5710329
    Abstract: The invention comprises a method of dispersing foulants, residues, gums, precipitates, polymeric tars and other highly oxidized carbonaceous tars which can be formed in the process of manufacture and recovery of acrylic acid. The method comprises adding to the liquid or gaseous phases passing through, or stored in acrylic acid process equipment, an effective antifouling amount of a dispersant which is stable in the environment within an acrylic acid process and is compatible with the equipment used for the manufacture of acrylic acid.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: January 20, 1998
    Assignee: Nalco/Exxon Energy Chemical, L. P.
    Inventor: Hester A. Clever