Patents Assigned to Lever Brothers, division of Conopco, Inc.
  • Patent number: 6301733
    Abstract: A process for washing laundry in a washing machine employs a receptacle for dispensing a detergent tablet. The receptacle is substantially rigid and includes a number of apertures which have an average dimension equivalent to a mesh size of between 1 and 10 mm. A solid detergent in the form of a tablet is placed in the dispensing receptacle, the latter then being placed into a washing machine along with laundry to be washed and a washing operation is carried out. After the washing operation, the device is removed from the machine and stored for subsequent use. Moreover, the invention relates to a dispensing device for carrying out this process.
    Type: Grant
    Filed: March 5, 1998
    Date of Patent: October 16, 2001
    Assignee: Lever Brothers, division of Conopco, Inc.
    Inventors: George Thomas Dawson, Francois Delwel, James William Gordon, Albert Cornelis de Jong, Colin Watt Kerr, Edwin Leo Lempers, Loic Marie Tardy
  • Patent number: 6235703
    Abstract: Surfactant blends, processes for preparing them and particulate detergent compositions containing them. Mobile liquid surfactant blends consisting essentially of alkyl polyglycosides and ethoxylated nonionic surfactant are provided, the surfactant blend having a viscosity at 65° C. measured at 50s−1 not exceeding 1 Pas, the weight ratio of alkyl polyglycoside to ethoxylated nonionic surfactant being within the range of from 35.65 to 65.35, there being from 2-25% of water. Various processes for the preparation of such blends are provided. The mobile surfactant blends can be used in the preparation of particulate detergent compositions or components by mixing the blend with a particulate carrier material without requiring a drying step.
    Type: Grant
    Filed: April 1, 1997
    Date of Patent: May 22, 2001
    Assignee: Lever Brothers, division of Conopco, Inc.
    Inventors: Peter Willem Appel, Huig Euser, Hendricus Anthonius Rebers, Cornelis Gerhard van Kralingen
  • Patent number: 5929021
    Abstract: A process for producing a detergent powder or a composition therefore involving partial granulation in a high or low shear granulator followed by granulation in a very low shear mixer, for example a fluid bed is disclosed. The process allows powders to be produced over a wide range of bulk densities without the use of a spray-drying step.
    Type: Grant
    Filed: December 12, 1996
    Date of Patent: July 27, 1999
    Assignee: Lever Brothers, Division of Conopco, Inc.
    Inventors: Vinodkumar Ramniranjan Dhanuka, Fakhruddin Esmail Pacha
  • Patent number: 5789365
    Abstract: A laundry detergent composition contains a surfactant system consisting wholly of anionic surfactant, or of anionic and nonionic surfactants in a ratio at least 0.9:1, a detergency builder, and a soil release polymer which is a defined water-soluble or water-dispersible sulphonated non-end-capped polyester, for example, of terephthalic acid, isophthalic acid, sulphoisophthalic acid and ethylene glycol.
    Type: Grant
    Filed: November 22, 1996
    Date of Patent: August 4, 1998
    Assignee: Lever Brothers Division of CONOPCO Inc.
    Inventors: Wilfried Blokzijl, Andrew Martin Creeth, Mohamad Sami Falou, Andrew David Green, Michael Hull, Reginald Vear Scowen
  • Patent number: 5480575
    Abstract: A method of protecting sensitive or reactive adjuncts, preferably of the type incorporated in detergent compositions, by dissolving said adjunct in a biopolymer, thereby forming a stable particulate adjunct product comprising a molecular solid solution of adjunct in a biopolymer. Preferred adjuncts to be protected include bleach catalysts, bleach catalyst precursors, bleach precursors, enzymes, fluorescers, germicides, perfumes, anti-dye transfer and anti-dye damage agents and effervescent agents. The protected adjunct is especially useful for incorporation in non-aqueous liquid detergent compositions.
    Type: Grant
    Filed: December 1, 1993
    Date of Patent: January 2, 1996
    Assignee: Lever Brothers, Division of Conopco, Inc.
    Inventors: Paul A. Altieri, James Eden, Michael C. Gribnau, Leendert Hoogendijk, Lambertus B. Krijnen, Daniel B. Solarek, Ton Swarthoff