Patents by Inventor Walter J. Freeman

Walter J. Freeman 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: 6458726
    Abstract: Process of producing skin-core fibers and the resulting fibers and nonwoven materials and articles wherein the fibers are composed of a polymer blend of a polyolefin and polymeric bond curve enhancing agents, such as ethylene vinyl acetate polymers.
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: October 1, 2002
    Assignee: Fiberco, Inc.
    Inventors: James H. Harrington, Randall E. Kozulla, John F. L. Newport, Edward J. Engle, Elizabeth L. Fahey, Walter J. Freeman, Rakesh K. Gupta, Carl J. Wust
  • Patent number: 6116883
    Abstract: Process and apparatus for spinning polymer filaments permits the obtaining of skin-core filament structure by feeding a polymer composition to a spinnerette at a flow rate sufficient to obtain a spinning speed of about 10 to 200 meters per minute through the spinnerette; heating the polymer composition at a location at or adjacent to the spinnerette so as to heat the polymer composition to a sufficient temperature to obtain a skin-core filament structure upon quenching in an oxidative atmosphere; extruding the heated polymer composition through the spinnerette at a spinning speed of about 10 to 200 meters per minute to form molten filaments; and quenching the molten filaments in an oxidative atmosphere so as to effect oxidative chain scission degradation of at least a surface of the molten filaments to obtain filaments having a skin-core structure.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: September 12, 2000
    Assignee: Fiberco, Inc.
    Inventors: Kunihiko Takeuchi, Rakesh K. Gupta, Shiv Sibal, Richard J. Coffin, Walter J. Freeman
  • Patent number: 5985193
    Abstract: Process of producing skin-core fibers and the resulting fibers and nonwoven materials and articles wherein the fibers are composed of a polymer blend of a polyolefin and polymeric bond curve enhancing agents, such as ethylene vinyl acetate polymers.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: November 16, 1999
    Assignee: Fiberco., Inc.
    Inventors: James H. Harrington, Randall E. Kozulla, John F. L. Newport, Edward J. Engle, Elizabeth L. Fahey, Walter J. Freeman, Rakesh K. Gupta, Carl J. Wust
  • Patent number: 5756026
    Abstract: A process for eliminating post-molding fabric curl and distortion in molded fabrics and fabrics produced thereby. The molded fabrics are laminates including a non-woven fabric face and a binder layer and/or sheet backing. Post-molding curling and distortion can be eliminated by maintaining heat on the face fabric until the backing has been cooled enough to be rigid.
    Type: Grant
    Filed: January 5, 1996
    Date of Patent: May 26, 1998
    Assignee: Fiberco, Inc.
    Inventors: William L. Sanchez, Walter J. Freeman
  • Patent number: 5705119
    Abstract: Process and apparatus for spinning polymer filaments permits the obtaining of skin-core filament structure by feeding a polymer composition to a spinnerette at a flow rate sufficient to obtain a spinning speed of about 10 to 200 meters per minute through the spinnerette; heating the polymer composition at a location at or adjacent to the spinnerette so as to heat the polymer composition to a sufficient temperature to obtain a skin-core filament structure upon quenching in an oxidative atmosphere; extruding the heated polymer composition through the spinnerette at a spinning speed of about 10 to 200 meters per minute to form molten filaments; and quenching the molten filaments in an oxidative atmosphere so as to effect oxidative chain scission degradation of at least a surface of the molten filaments to obtain filaments having a skin-core structure.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: January 6, 1998
    Assignee: Hercules Incorporated
    Inventors: Kunihiko Takeuchi, Rakesh K. Gupta, Shiv Sibal, Richard J. Coffin, Walter J. Freeman
  • Patent number: 5683809
    Abstract: Protective articles such as diapers, having filmless hydrophobic barrier elements such as cuffs and backing sheets. The barrier cuffs--which can be, for instance, leg cuffs and waistbands--and the backing sheets can be provided from fabrics having a fabric weight of at least 10 gsy; these fabrics are made of cardable, hydrophobic polyolefin fibers having a dpf value of not more than about 2.0.
    Type: Grant
    Filed: May 5, 1994
    Date of Patent: November 4, 1997
    Assignee: Hercules Incorporated
    Inventors: Walter J. Freeman, Rakesh K. Gupta, James H. Harrington, Richard J. Legare, Thomas L. Smith, Adrienne W. Williams
  • Patent number: 4753246
    Abstract: Method and apparatus for producing enhanced EEG or MEG information related to a selected brain activity in a subject. The apparatus includes a two-dimensional array of at least about 16 sensors for recording EEG or MEG traces from the subject. Control and test traces recorded before and during an interval in which the brain activity is occurring, respectively, are each decomposed into a series of basis functions which may be analytic components such as temporal frequency components, generated by spectral decomposition of an ensemble average of the recorded traces, or principal components determined by principal component analysis. The control and test traces are then represented as a sum of the products of the individual basis functions times a spatial domain matrix which represents the spatial pattern of amplitudes of that basis function, as measured by the individual sensors in the array.
    Type: Grant
    Filed: March 28, 1986
    Date of Patent: June 28, 1988
    Assignee: The Regents of the University of California
    Inventor: Walter J. Freeman
  • Patent number: 4748674
    Abstract: A pattern learning and recognition device. The device includes a parallel processing network for receiving and processing an N-dimensional vector input, and a control system for calculating, and storing output signal correlation information during the learning mode of the device, and for distributing the learned information to the network, in the form of feedback gain, during the pattern-recognition mode of the device. The network is preferably composed of an array of N oscillatory units designed to bifurcate from a rest to an active state when stimulated with a threshold input voltage surge.
    Type: Grant
    Filed: October 7, 1986
    Date of Patent: May 31, 1988
    Assignee: The Regents of the University of Calif.
    Inventor: Walter J. Freeman
  • Patent number: 4416288
    Abstract: Signals representative of electric potentials generated by cells of a given depth in the cerebral cortex or in other organs of a living body are detected at the surface thereof by an array of electrodes. These signals are amplified, digitized, and then spatially deconvoluted, to remove distortions introduced by the physical properties of the organ, to recover the desired pattern of electric potential within the living body.
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: November 22, 1983
    Assignee: The Regents of the University of California
    Inventor: Walter J. Freeman