Patents by Inventor Guy Thomas Woodrum

Guy Thomas Woodrum 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).

  • Superabsorbents having superior permeability and conveying properties
    Patent number: 8017549
    Abstract: A superabsorbent having superior permeability and conveying properties comprises a permeability enhancing agent and a cohesion control agent and has a free swell gel bed permeability of at least 15 Darcies and a Hausner ratio in the range of 1.18 to 1.34.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: September 13, 2011
    Assignee: BASF SE
    Inventors: Norbert Herfert, Martin Wendker, Hermann Josef Feise, Hanno Rüdiger Wolf, Bill Chiang, Guy Thomas Woodrum
  • Superabsorbents Having Superior Permeability and Conveying Properties
    Publication number: 20100093949
    Abstract: A superabsorbent having superior permeability and conveying properties comprises a permeability enhancing agent and a cohesion control agent and has a free swell gel bed permeability of at least 15 Darcies and a Hausner ratio in the range of 1.18 to 1.34.
    Type: Application
    Filed: November 7, 2007
    Publication date: April 15, 2010
    Applicant: BASF SE
    Inventors: Norbert Herfert, Martin Wendker, Hermann Josef Feise, Hanno Rüdiger Wolf, Bill Chiang, Guy Thomas Woodrum
  • Color-stable superabsorbent polymer composition
    Patent number: 7504551
    Abstract: A color-stable superabsorbent polymer having long-term color stability, and methods of manufacturing the polymer, are disclosed. The superabsorbent polymer is prepared using a sulfinic acid derivative, like 2-hydroxy-2-sulfinatoacetic acid, a salt thereof, or a mixture thereof, as the reducing agent in a polymerization initiator system for the preparation of a superabsorbent polymer from monomers. The resulting superabsorbent polymer resists color degradation during periods of extended storage, even at an elevated temperature and humidity.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: March 17, 2009
    Assignee: BASF Aktiengesellschaft
    Inventors: Norbert Herfert, Michael M. Azad, Peter W. Carrico, Guy Thomas Woodrum, Michael A. Mitchell, Ma-Ikay Kikama Miatudila
  • Method of Drying an Absorbent Polymer with a Surfactant
    Publication number: 20090005482
    Abstract: A method of drying an absorbent polymer includes providing the absorbent polymer. A surfactant having a C10 to C24 ester group is incorporated with the absorbent polymer. An acid value of the surfactant is increased to further increase drying efficiency of the absorbent polymer. More specifically, after increasing the acid value of the surfactant, the absorbent polymer exhibits improved pumpability and spreadability, as compared to absorbent polymers including the surfactant without having the acid value of the surfactant increased.
    Type: Application
    Filed: November 23, 2006
    Publication date: January 1, 2009
    Applicant: BASF SE
    Inventors: Jay Gregory Otten, Christopher G. Utz, Guy Thomas Woodrum
  • Superabsorbent polymers and method of manufacturing the same
    Patent number: 7329701
    Abstract: Superabsorbent polymer (SAP) particels containing a clay are disclosed. The clay is added to an SAP hydrogel prior to SAP neutralization to provide particles having improved fluid acquisition rates and an improved permeability of a fluid through the swollen SAP-clay particles. Diaper cores and absorbent articles containing the SAP-clay particles also are disclosed.
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: February 12, 2008
    Assignee: BASF Aktiengesellschaft
    Inventors: Norbert Herfert, Michael M. Azad, Michael A. Mitchell, Guy Thomas Woodrum, William G.-J. Chiang, Patricia D. Brown, James C. Robinson