Patents by Inventor Andrew Dorset

Andrew Dorset 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).

  • Process for making granular detergents
    Patent number: 5998356
    Abstract: A process for making granular detergents is disclosed. In a first step, an aqueous slurry is formed. The aqueous slurry comprises anionic surfactant, chelating agents, at least 0.5%, by weight, of sodium aluminosilicate, and inorganic salts of a type which raise the ionic conductivity of the aqueous slurry. The aqueous slurry contains essentially no silicates and has a low viscosity suitable for spray-drying to form crisp, free-flowing powder. After being formed, the slurry is dried to form a particulate detergent composition.
    Type: Grant
    Filed: March 12, 1998
    Date of Patent: December 7, 1999
    Assignee: The Procter & Gamble Company
    Inventors: Zayeed Alam, Andrew Dorset, Kay Emma Fitzgibbon
  • Granular detergent composition comprising a low bulk density component
    Patent number: 5756445
    Abstract: A granular detergent component having a bulk density of less than 400 g/l comprises from 20% to 50%, by weight, of aluminosilicate, optionally up to 50%, by weight, of a co-filler, and 0.05% to 2%, by weight, of anionic surfactant, preferably C14-C20 alkyl sulphate. The low bulk density component is preferably mixed with other components such as percarbonate, silicate, layered silicate, carbonate, bicarbonate, sesquicarbonate, sulphate, citrate and mixtures thereof to provide a granular detergent composition.
    Type: Grant
    Filed: July 30, 1996
    Date of Patent: May 26, 1998
    Assignee: The Proctor & Gamble Company
    Inventors: Andrew Dorset, Robin Gibson Hall
  • Process for making detergent granules by neutralization of sulphonic acids
    Patent number: 5486317
    Abstract: A process for making a detergent particle comprises neutralization of the acid form of an anionic surfactant in a high shear mixer by a stoichiometric excess of finely divided particulate neutralizing agent having an average particle size of less than 5 .mu.m. A free-flowing detergent composition is made with the process.
    Type: Grant
    Filed: August 10, 1994
    Date of Patent: January 23, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Andrew Dorset, Olivier Paquatte