Patents by Inventor Stephen Culshaw

Stephen Culshaw 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 cleaning hard-surfaces using a composition containing organic solvent and polycarboxylated chelating agent
    Patent number: 5202050
    Abstract: Safe and effective hard-surface cleaning compositions are disclosed, which contain a binary mixture of an organic solvent and a narrowly defined chelating agent.
    Type: Grant
    Filed: September 19, 1990
    Date of Patent: April 13, 1993
    Assignee: The Procter & Gamble Company
    Inventors: Stephen Culshaw, Eddy Vos
  • Hard-surface cleaning compositions containing iminodiacetic acid derivatives
    Patent number: 5051212
    Abstract: Hard-surface cleaning compositions are disclosed, containing an organic solvent having a boiling point above 90.degree. C., and a chelating agent derived from iminodiacetic acid.
    Type: Grant
    Filed: November 9, 1988
    Date of Patent: September 24, 1991
    Assignee: The Procter & Gamble Company
    Inventors: Stephen Culshaw, Eddy Vos, Frederick E. Hardy
  • Viscous hard-surface cleaning compositions containing a binary glycol ether solvent system
    Patent number: 4966724
    Abstract: Liquid hard-surface cleaning compositions are disclosed which have a viscosity above 30 cps, show excellent cleaning on both kitchen and bathroom soils, and excellent shine performance.These compositions are substantially free of hydrotropes, and contain a narrowly-defined binary solvent system constituted by Butyl Carbitol as one of the solvents and Butoxy Propoxy Propanol or Hexyl Carbitol as the other solvent.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: October 30, 1990
    Assignee: The Procter & Gamble Company
    Inventors: Stephen Culshaw, Eddy Vos
  • Creamy scouring compositions
    Patent number: 4676920
    Abstract: Viscous creamy scouring compositions substantially free of terpene solvents are disclosed. These compositions contain a binary system represented by a water-insoluble hydrocarbon solvent and a long-chain fatty alcohol.
    Type: Grant
    Filed: July 30, 1986
    Date of Patent: June 30, 1987
    Inventor: Stephen Culshaw