Patents by Inventor Ian E. Niven

Ian E. Niven 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).

  • Particulate bleaching detergent composition
    Patent number: 5236613
    Abstract: There is provided a particulate bleaching detergent composition having improved stability, said composition comprising a zeolite built base powder and alkalimetal percarbonate particles having a morphology index of less than 0.06. The morphology index is defined as:MI=0.0448 * CV+3.61 * 10.sup.6 /d.sup.3where CV is the coefficient of variation of the weight average particle size distribution, and d is the weight mean average particle size (in microns).
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: August 17, 1993
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Peter F. Garner-Gray, Ian E. Niven
  • Laundry treatment product
    Patent number: 5160654
    Abstract: A laundry treatment product, in the form of a sachet containing a particulate bleaching detergent composition containing sodium percarbonate, has at least two compartments to enable the sodium percarbonate to be segregated from certain other ingredients, particularly zeolites. The sachet product exhibits improved bleach stability on storage. Sachets of water-soluble polyvinyl alcohol film are not insolubilized in the wash liquor since no sodium perborate is present to generate insolubilizing borate ions.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: November 3, 1992
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Mohamad S. Falou, Timothy D. Finch, Peter F. Garner-Gray, Andrew T. Hight, Martin M. Murphy, Geoffrey Newbold, Ian E. Niven, Derek G. Savill
  • Laundry treatment product
    Patent number: 5132036
    Abstract: A laundry treatment product, in the form of a single-compartment of multicompartment sachet capable of releasing its contents into the wash liquor during the laundry process, contains a particulate laundry treatment composition including a quaternary ammonium- or phosphonium-substituted bleach precursor, for example, cholyl-4-sulphophenyl carbonate, optionally together with a peroxy bleach compound and optionally together with one or more detergent ingredients. The sachet may be a self-contained whole wash product, or a bleach adjunct for use in conjunction with a separate detergent composition.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: July 21, 1992
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Mohamad S. Falou, Timothy D. Finch, Peter F. Garner-Gray, Andrew T. Hight, Martin J. Murphy, Geoffrey Newbold, Ian E. Niven, Derek G. Savill
  • Detergent powders and processes for producing them
    Patent number: 4645616
    Abstract: The formation of poorly-dispersible material by interaction between sodium silicate and sodium aluminosilicate in a detergent powder can be reduced by acidification of the slurry prior to spray-drying. An acid in an amount equivalent to from 1.5 to 3 parts by weight of hydrogen chloride per 6 parts of sodium silicate of sodium oxide to silica ratio 1 to 1.6 is added to precipitate at least part of the silicate. Optionally, a powder-structurant is present.
    Type: Grant
    Filed: October 31, 1985
    Date of Patent: February 24, 1987
    Assignee: Lever Brothers Company
    Inventors: Ian E. Niven, Andrew W. Travill