Patents by Inventor Willem Robert Van Dijk

Willem Robert Van Dijk 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).

  • Liquid cleaning compositions and their use
    Publication number: 20030191040
    Abstract: An aqueous liquid cleaning composition comprising a proteolytic enzyme and a primary stabiliser therefor, the composition further comprising a polyoxometalate.
    Type: Application
    Filed: March 26, 2003
    Publication date: October 9, 2003
    Applicant: Unilever Home & Personal Care USA, Division of Conopco, Inc.
    Inventors: Arend Jan Adriaanse, Willem Robert Van Dijk, Ronald Hage
  • Concentrated liquid detergent composition
    Patent number: 6569827
    Abstract: A physically stable, concentrated isotropic liquid detergent composition comprises (a) from 10 to 70% of an anionic, nonionic, cationic, zwitterionic active detergent material or mixtures thereof, (b) from 0.0001 to 10% of protease; (c) from 2 to 40% of at least one carbohydrate selected from oligosaccharides, polysaccharides and derivatives thereof, wherein n=1-5, and (d) less than 3% of an antioxidant selected from the group consisting of alkalimetalsulphites, alkalimetalbisulphites, alkalimetabisulphites or alkalimetalthiosulphates.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: May 27, 2003
    Assignee: Unilever Home & Personal Care USA, division of Conopco, Inc.
    Inventors: Willem Robert Van Dijk, Theresia Maria Olsthoorn, Marja Ouwendijk, Johannes Cornelis van de Pas
  • Liquid cleaning compositions and their use
    Publication number: 20020198127
    Abstract: An aqueous liquid cleaning composition having a pH of at least 7, preferably from 7 to 11, more preferably from 7 to 10 and comprising from 1% to 90% by weight of surfactant, a proteolytic enzyme and a primary stabiliser therefor, the composition further comprising an organic substance which forms a complex with a transition metal, the complex being capable of catalysing bleaching of a substrate by atmospheric oxygen.
    Type: Application
    Filed: February 26, 2002
    Publication date: December 26, 2002
    Applicant: Unilever Home & Personal Care USA, Division of Conopco, Inc.
    Inventors: Arend Jan Adriaanse, Willem Robert Van Dijk, Ronald Hage, Marja Ouwendijk, Simon Marinus Veerman
  • Liquid detergent composition
    Publication number: 20020028755
    Abstract: A liquid detergent composition comprising
    Type: Application
    Filed: June 13, 2001
    Publication date: March 7, 2002
    Applicant: Unilever Home & Personal Care USA, Division of Conopco, Inc.
    Inventors: Willem Robert Van Dijk, Theresia Maria Olsthoorn, Marja Ouwendijk, Johannes Cornelis Van De Pas
  • Concentrated liquid detergent composition
    Publication number: 20020019326
    Abstract: A physically stable, concentrated isotropic liquid detergent composition comprises (a) from 10 to 70% of an anionic, nonionic, cationic, zwitterionic active detergent material or mixtures thereof, (b) from 0.0001 to 10% of protease; (c) from 2 to 40% of at least one carbohydrate selected from oligosaccharides, polysaccharides and derivatives thereof, wherein n=1-5, and (d) less than 3% of an antioxidant selected from the group consisting of alkalimetalsulphites, alkalimetalbisulphites, alkalimetabisulphites or alkalimetalthiosulphates.
    Type: Application
    Filed: June 13, 2001
    Publication date: February 14, 2002
    Applicant: Unilever Home & Personal Care USA, Division of Conopco, Inc.
    Inventors: Willem Robert Van Dijk, Theresia Maria Olsthoorn, Marja Ouwendijk, Johannes Cornelis Van De Pas
  • Enzymatic composition
    Patent number: 5782932
    Abstract: Enzymatic compositions with improved storage stability of the enzymes contained therein are obtained by including an enzyme stabiliser, preferably by way of a particular process.
    Type: Grant
    Filed: June 18, 1996
    Date of Patent: July 21, 1998
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Willem Robert van Dijk, Marja Ouwendijk, Peter John Hall