Patents Represented by Attorney Richard C. White

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  • Powdered abrasive cleansers with encapsulated perfume
    Patent number: 4961871
    Abstract: Powdered, abrasive, hard surface cleansers containing micro-encapsulated perfume wherein the capsules are essentially water-insoluble, but can become perfume permeable during use by the combined action of water and abrasive. The preferred capsules are formed from gelatin and a polyanionic material by coacervation techniques and then are cross-linked to provide controlled water insolubility.
    Type: Grant
    Filed: November 14, 1989
    Date of Patent: October 9, 1990
    Assignee: The Procter & Gamble Company
    Inventor: Daniel W. Michael