Patents by Inventor David W. York

David W. York 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).

  • Publication number: 20090090387
    Abstract: Methods of removing cooked-, baked-, or burnt-on food soil from cookware and tableware comprising washing the cookware/tableware in an automatic dishwashing machine in the presence of a wash liquor comprising nanoparticles is disclosed herein.
    Type: Application
    Filed: March 20, 2007
    Publication date: April 9, 2009
    Applicants: THE PROCTER & GAMBLE COMPANY, ILLINOIS INSTITUTE OF TECHNOLOGY
    Inventors: Anju D. Massey Brooker, Nigel Patrick Somerville Roberts, David W. York, Yulong Ding, Darsh T. Wasan, Alex D. Nikolov
  • Patent number: 5610131
    Abstract: A process for making a granular laundry detergent component or composition having a bulk density of at least 650 g/l, comprises dissolving a structuring agent in a nonionic surfactant, said structuring agent comprising a polymer, to form a pumpable premix and finely dispersing said premix with an effective amount of powder at a given operating temperature wherein the premix has a viscosity of at least 350 mPas when measured at said operating temperature and at a shear rate of 25s-.sup.1. Preferred structurants comprise polymers having more than one functional hydroxyl group, especially polyvinyl alcohols, polyhydroxyacrylic acid polymers, and polymers such as polyvinyl pyrrolidone and PVNO, as well as sugars, artificial sweeteners and their derivatives. The premix is then processed into a granular detergent by any suitable process. Fine dispersion mixing, agglomeration, or spraying the premix onto a granular base product are preferred.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: March 11, 1997
    Assignee: The Procter & Gamble Company
    Inventors: Scott J. Donoghue, Kay E. Fitzgibbon, Paul A. R. G. France, Robin G. Hall, Carole P. D. Wilkinson, David W. York, John C. Schmitt
  • Patent number: 5591705
    Abstract: The present invention provides rinse-active foam-control particles for inclusion in a detergent composition in powder form, consisting essentially of a soap of fatty acids of which at least 80% contain from 16 to 18 carbon atoms, the geometric mean particle size of the particles being inferior to 1 mm, preferably inferior to 0.4 mm.The present invention also encompasses a process for making said foam-control agents, as well as high sud and low sud executions of detergent compositions containing said foam-control particles.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: January 7, 1997
    Assignee: The Procter & Gamble Company
    Inventors: Alan D. Brinson, David X. Cumming, David W. York
  • Patent number: 4990280
    Abstract: A photoactivator dye composition includes microcapsules of a solid dispersion of a water-soluble photoactivator dye in an encapsulating material that is quickly soluble in water. In a method of preparing such a photoactivator dye composition, the photoactivator dye is dissolved in an aqueous medium, the solution thus obtained is mixed with an aqueous solution of the encapsulating material, the mixture thus obtained is converted into droplets, and the moisture content of these droplets is reduced to form a solid solution. The photoactivator dye composition may advantageously be used in a detergent composition which additionally includes a surfactant and conventional detergent ingredients.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: February 5, 1991
    Assignees: Danochemo A/S, The Proctor & Gamble Co.
    Inventors: Bitten Thorengaard, David W. York