Patents Represented by Attorney Matthew J. McDonald

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  • Enzymatic liquid detergent composition
    Patent number: 4767562
    Abstract: The invention relates to an aqueous, enzymatic liquid detergent with improved enzyme stability. By inclusion of a specific type of preservative of the isothiazolinone type, the rate of enzyme deactivation is significantly retarded.
    Type: Grant
    Filed: December 3, 1986
    Date of Patent: August 30, 1988
    Assignee: Lever Brothers Company
    Inventor: Alan J. Fry
  • Dentifrice compositions
    Patent number: 4749561
    Abstract: It is disclosed that a dentifrice which includes a surfactant and an anti-plaque agent comprising a substantially water-insoluble non-cationic antimicrobial agent or a zinc salt or a mixture thereof has enhanced activity when the dentifrice comprises at least 0.2% by weight of a lamellar liquid crystal surfactant phase having a lamellar spacing of less than 6.0 nm.
    Type: Grant
    Filed: September 11, 1987
    Date of Patent: June 7, 1988
    Assignee: Lever Brothers Company
    Inventors: Roger M. Lane, Derek M. C. Hull, Charles A. Saxton, Franciscus J. G. Van Der Ouderaa
  • Dentifrice compositions
    Patent number: 4749562
    Abstract: It is disclosed that a dentifrice which includes a surfactant and an anti-plaque agent comprising a substantially water-insoluble non-cationic antimicrobial agent or a zinc salt or a mixture thereof has enhanced activity when the dentifrice comprises at least 0.2% by weight of a lamellar liquid crystal surfactant phase having a lamellar spacing of less than 6.0 nm.
    Type: Grant
    Filed: September 11, 1987
    Date of Patent: June 7, 1988
    Assignee: Lever Brothers Company
    Inventors: Roger M. Lane, Derek M. C. Hull, Charles A. Saxton, Franciscus J. G. Van der Ouderaa
  • Dentifrice compositions
    Patent number: 4656031
    Abstract: It is disclosed that a dentifrice which includes a surfactant and an anti-plaque agent comprising a substantially water-insoluble non-cationic antimicrobial agent or a zinc salt or a mixture thereof has enhanced activity when the dentifrice comprises at least 0.2% by weight of a lamellar liquid crystal surfactant phase having a lamellar spacing of less than 6.0 nm.
    Type: Grant
    Filed: May 7, 1985
    Date of Patent: April 7, 1987
    Assignee: Lever Brothers Company
    Inventors: Roger M. Lane, Derek M. C. Hull, Charles A. Saxton, Franciscus J. G. van der Ouderaa