Patents by Inventor John Prettie

John Prettie 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).

  • Bleach compositions comprising manganese-containing bleach catalysts
    Patent number: 5686014
    Abstract: Bleaching compositions useful for laundering fabrics comprising a manganese bleach catalyst at a level below about 40 ppm manganese sourced by the catalyst. Also, acid wash methods useful for reducing the bleach catalyst carry-over from laundry bleach compositions containing metal-containing bleach catalysts, said methods comprising contacting fabrics impregnated with metal-containing bleach catalysts with an aqueous acidic solution having a pH below about 4.0.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: November 11, 1997
    Assignee: The Procter & Gamble Company
    Inventors: Gerard Marcel Abel Baillely, Richard Timothy Hartshorn, Thomas Edward Cook, Alistair John Pretty, Christian Leo Marie Vermote
  • Segmented turning device
    Patent number: 5109975
    Abstract: A device and method for positively controlling and rotating an item through a predetermined angle in a plane as said item is moved longitudinally in the plane. Different lateral portions of the item are moved at different speeds in the longitudinal direction to effect the rotation. Preferably a pair of cone shaped segmented rollers are utilized which have a nip formed between high sections of the rollers, coplanar with the plane of rotation. Alternatively a pair of spaced segmented rollers having different linear surface speeds can be used to move the spaced lateral portions of the item at the different linear speeds. Positive control of the item is provided by opposed rotating members such as opposed belt conveyors or opposed sets of rollers and a mechanism is provided to selectively engage or release the opposed rotating members as required by the rotation of the item.
    Type: Grant
    Filed: January 11, 1991
    Date of Patent: May 5, 1992
    Assignee: H.G. Weber & Co., Inc
    Inventor: John Prettie
  • Method and apparatus for rotating an item
    Patent number: 5012915
    Abstract: A device and method for positively controlling and rotating an item through a predetermined angle in a plane as said item is moved longitudinally in the plane. Different lateral portions of the item are moved at different speeds in the longitudinal direction to effect the rotation. Preferably a pair of cone shaped rollers are utilized which have a nip formed therebetween, coplanar with the plane of rotation. Alternatively a pair of spaced rollers having different linear surface speeds can be used to move the spaced lateral portions of the item at the different linear speeds. Positive control of the item is provided by opposed rotating members such as opposed belt conveyors or opposed sets of rollers and a mechanism is provided to selectively engage or release the opposed rotating members as required by the rotation of the item.
    Type: Grant
    Filed: February 15, 1990
    Date of Patent: May 7, 1991
    Assignee: H.G. Weber & Co., Inc.
    Inventors: Jay L. Kristola, John Prettie