Patents by Inventor Melvin Scott

Melvin Scott 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).

  • Detergent compositions
    Patent number: 4734221
    Abstract: Stable, high-concentration (60-80% active matter) aqueous liquid detergent compositions based on dialkyl sulphosuccinates and alkyl ether sulphates contain a lower alcohol, preferably ethanol, and water, the ratio of lower alcohol to water exceeding a critical ratio which varies with the total active detergent content. The compositions may be thickened by means of hydroxypropyl guars, polyethylene oxides, or hydrophilically substituted cellulosic polymers such as hydroxyethyl cellulose.
    Type: Grant
    Filed: January 14, 1987
    Date of Patent: March 29, 1988
    Assignee: Lever Brothers Company
    Inventors: Robert J. Edwards, Paul D. Hardman, Melvin Scott, Carey J. Walsh, Peter Winterbotham
  • Detergent compositions
    Patent number: 4680143
    Abstract: A high foaming aqueous liquid detergent composition suitable inter alia for manual dishwashing is based on a ternary active detergent system of (a) dialkyl sulphosuccinate, (b) alkylbenzene sulphonate and/or secondary alkane sulphonate and (c) alkyl ether sulphate. This combination gives both performance and formulation (viscosity, hydrotropy) benefits.
    Type: Grant
    Filed: June 25, 1985
    Date of Patent: July 14, 1987
    Assignee: Lever Brothers Company
    Inventors: David J. Edge, Appaya R. Naik, Melvin Scott
  • Detergent compositions
    Patent number: 4596672
    Abstract: In a foaming liquid detergent composition suitable inter alia for hand dishwashing and including in its detergent-active system a dialkyl sulphosuccinate, performance is enhanced and physical characteristics (stability, viscosity, hydrotrope requirement) are improved by the inclusion of a fatty acid dialkanolamide such as lauric diethanolamide.
    Type: Grant
    Filed: June 21, 1985
    Date of Patent: June 24, 1986
    Assignee: Lever Brothers Company
    Inventors: Malcolm G. J. MacDuff, Appaya R. Naik, Melvin Scott
  • Liquid detergent composition comprising selected alkylbenzene sulphonates and alkyl ether sulphates
    Patent number: 4537709
    Abstract: In light-duty liquid detergent compositions suitable for hand dishwashing, improved foaming performance, especially in hard water, is obtained by using combinations of particular alkylbenzene sulphonates (linear C.sub.10 -C.sub.13 alkylbenzene sulphonates substantially free of other alkyl chain lengths and containing only minor amounts of C.sub.13 material) and particular alkyl ether sulphates (those containing 20% or less of C.sub.14 and above material and having an average degree of ethoxylation of from 1 to 12).
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: August 27, 1985
    Assignee: Lever Brothers Company
    Inventors: David J. Edge, Appaya R. Naik, Melvin Scott
  • Stable liquid detergent suspensions
    Patent number: 4530775
    Abstract: Liquid media, capable of stably suspensing undissolved particulate material, comprise, in an aqueous medium, an anionic detergent, a non condensed phosphate electrolyte and a fatty acid monoalkylolamide. Such media, and the suspensions of undissolved particulate material therein, have a significantly improved shear stability. The media are particularly useful to suspend particulate abrasive material to yield liquid abrasive cleaning compositions.
    Type: Grant
    Filed: November 8, 1982
    Date of Patent: July 23, 1985
    Assignee: Lever Brothers Company
    Inventors: John M. Brierley, Melvin Scott
  • Stable liquid detergent suspensions
    Patent number: 4397755
    Abstract: The invention pertains to liquid media, in which particulate materials can be stably suspended, e.g. liquid abrasive cleaning compositions.These products can suffer from a shear-stability problem, and according to the invention this problem can be overcome by the inclusion of a low level, e.g. 0.001-0.2% of a hectorite clay.
    Type: Grant
    Filed: October 15, 1981
    Date of Patent: August 9, 1983
    Assignee: Lever Brothers Company
    Inventors: John M. Brierley, Melvin Scott