Patents by Inventor Robin Gibson

Robin Gibson 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).

  • Patent number: 5843878
    Abstract: Detergent compositions comprising anionic ethoxylated or propoxylated hydroxy ethane and propane sulfonate, NaO.sub.3 SCH.sub.2 CH.sub.2 CH.sub.2 --O(CH.sub.2 CH.sub.2 O).sub.n -- end-capped esters useful as soil release agents. The esters further contain terephthalate units, oxy-1,2-alkyleneoxy units (oxyethyleneoxy units preferred), and sulfoisophthalate units.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: December 1, 1998
    Assignee: Procter & Gamble Company
    Inventors: Eugene Paul Gosselink, Robert Ya-Lin Pan, Robin Gibson Hall
  • 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
  • Patent number: 5756447
    Abstract: A cleaning composition contains (a) a detersive surfactant and (b) a poly(amino acid) compound or a precursor thereof, the said component (b) being protected from contact with a level of alkalinity as would cause degradation thereof. The component (b) may be stabilized by, for example, coating it with an organic acid compound or with a film-forming polymer; by agglomerating it with a controlled level of alkaline or alkaline-reacting compound (e.g. sodium carbonate); by spray-granulating it in admixture with a nonionic surfactant; by encapsulating it with a silicone-based resin; or by incorporating it in a composition that is non-alkaline. The storage stability of the compositions is thereby improved.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: May 26, 1998
    Assignee: The Procter & Gamble Company
    Inventor: Robin Gibson Hall