Patents by Inventor Stuart E. Lebo

Stuart E. Lebo 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).

  • Patent number: 7901701
    Abstract: Disclosed are compositions and methods related to powder and granular emulsifiable concentrate pesticide formulations. As disclosed, emulsions from non-aqueous based liquid or solvent soluble pesticide actives may be prepared using a high purity, high molecular weight sulfonated lignin as the emulsion stabilizer. The resulting emulsions may then be dried to obtain a powder or granular emulsion concentrate where the high molecular weight sulfonated lignin acts as a solid matrix for the pesticide active. The powder or granular emulsifiable concentrate formulations thus formed have high loading rates, good storage properties and are easily reconstituted when added to water.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: March 8, 2011
    Assignee: Lignotech USA, Inc.
    Inventors: Thomas S. Winowiski, Stuart E. Lebo, Scott E. Davis, Stig Are Gundersen
  • Publication number: 20080152755
    Abstract: To increase the efficiency of utilizing protein, lipid and starch by ruminants, feed and urea-formaldehyde polymer are mixed in quantities suitable for a crosslinking reaction. The mixture is heated at a temperature, moisture content and time sufficient to covalently bond the urea-formaldehyde polymer with the proteins and starches to thereby protect the proteins, starches and contained lipids from degradation by rumen microbes.
    Type: Application
    Filed: December 21, 2006
    Publication date: June 26, 2008
    Inventors: Stuart E. Lebo, Thomas S. Winowiski
  • Publication number: 20020056405
    Abstract: An improved non-dispersing set retarder additive for foamed cements, cement compositions containing the additive, and methods of cementing in a subterranean zone penetrated by a well bore are provided. The set retarder additive includes a blend of a sulfonated lignin, preferably a lignosulfonate, with an alkali lignin, preferably a kraft lignin, having an organic sulfur content of 0-3.5% by weight in a ratio of about 6:4 to 8:2. The methods are basically comprised of the steps of preparing a foamed cement composition comprised of hydraulic cement, a non-dispersing set retarder, sufficient water to form a slurry, sufficient gas to foam the slurry and a foaming and foam stabilizing surfactant present in an amount sufficient to facilitate the formation of the foam and stabilize the foamed cement composition.
    Type: Application
    Filed: November 21, 2001
    Publication date: May 16, 2002
    Applicant: Ligno Tech USA, Inc.
    Inventors: Stuart E. Lebo, Shane L. Resch
  • Publication number: 20020009787
    Abstract: A process for recovering a protein such as an enzyme from an aqueous solution using a lignosulfonate having a low degree of sulfonation. Also disclosed are protein/lignosulfonate complexes and use of these in granules.
    Type: Application
    Filed: July 30, 2001
    Publication date: January 24, 2002
    Applicant: Genencor International, Inc.
    Inventors: Nathaniel T. Becker, Stuart E. Lebo
  • Patent number: 6019835
    Abstract: This invention provides improved cement composition and biodegradable dispersants therefor. The biodegradable dispersants are basically comprised of a high molecular weight, phenolic hydroxy group blocked, alkali metal lignosulfonate.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: February 1, 2000
    Assignees: Halliburton Energy Services, Inc., LignoTech U.S.A., Inc.
    Inventors: Jiten Chatterji, D. Chad Brenneis, Dennis W. Gray, Stuart E. Lebo, Stephen L. Dickman
  • Patent number: 5939089
    Abstract: A method of encapsulating a pesticide with an ultraviolet protectant comprises the steps of forming a slurry of a pesticide and a lignin-containing material, and spraying a stream of acid and the slurry into contact with one another to precipitate the lignin-containing material onto the pesticide and form a protective coating on the pesticide. The pesticide is preferably a biopesticide, and the lignin-containing material is preferably kraft lignin. The method is easily adapted to industrial processes currently used for pesticide production by simply changing the spray drier from a single nozzle system to a dual spray nozzle and then adding the acid stream to the dual nozzle.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: August 17, 1999
    Assignee: LignoTech USA, Inc.
    Inventors: Kevin R. Wirtz, Stuart E. Lebo, Michael E. Sanford