Patents by Inventor Robin John

Robin John 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).

  • Method for preparing granulated detergent formulations
    Patent number: 4059538
    Abstract: Detergent formulations are granulated commercially by spray drying a slurry of the formulation. There is now proposed a method in which the components in powder form are granulated with a binder in a substantially horizontal annular rotating bed. The binder may be released by the action of the rotating bed.
    Type: Grant
    Filed: March 1, 1976
    Date of Patent: November 22, 1977
    Assignee: Lever Brothers Company
    Inventors: Robin John Green, Richard Shaw Johnson, John Kenneth Potter
  • High magnification optical apparatus
    Patent number: 4012109
    Abstract: The invention provides an optical device for use in microscopes and screen projectors comprising a screen formed with multiple lenticular surfaces mechanically traversed at a speed above persistence of vision in the light path between an object and an observation plane, the lenticular surfaces increasing the angle of light ray pencil egress from their angle of incidence to an extent rendering the use of eyepieces unnecessary.
    Type: Grant
    Filed: November 29, 1971
    Date of Patent: March 15, 1977
    Assignee: Vision Engineering Limited
    Inventor: Robin John Freeman
  • Protection of materials
    Patent number: 4009113
    Abstract: The disclosure relates to the protection of solid precursors in powder detergent compositions using a hydrogen peroxide bleach system. The finely divided precursor is formed, with a carrier material, into a composite particle which is then coated. The coated particle gives good dispersion of the precursor in the wash liquor.
    Type: Grant
    Filed: February 25, 1974
    Date of Patent: February 22, 1977
    Assignee: Lever Brothers Company
    Inventors: Robin John Green, Richard Shaw Johnson
  • Enzyme granules
    Patent number: 4009076
    Abstract: Enzyme granules, particularly for detergent compositions, are prepared having a granule core of solid material carrying an enzyme and a solid coating of plasticized resin free of the enzyme. The plasticized resin can be dextrin or sodium lignosulphonate containing a plasticizer such as glucose, sucrose urea, glycerol or ethylene glycol. The granules are made by spraying the enzyme-containing core with a concentrated aqueous solution of the plasticized resin.
    Type: Grant
    Filed: November 2, 1973
    Date of Patent: February 22, 1977
    Assignee: Lever Brothers Company
    Inventors: Robin John Green, Michael David Key, Keith William Murray