Patents by Inventor Stefano Alfano

Stefano Alfano 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).

  • Colored acidic aqueous liquid compositions comprising a peroxy-bleach
    Patent number: 5910473
    Abstract: This invention relates to colored acidic thickened aqueous compositions comprising a source of peroxygen and from 0.002% to 0.05% by weight of the total composition of an .alpha. or .beta. metal phthalocyanine dye, or mixtures thereof. Preferred compositions therein comprise a thickening surfactant system such as a quaternary ammonium compound together with a short chain amine oxide. Said compositions are particularly suitable for the cleaning of toilet bowls providing enhanced perceived viscosity by the consumer and enhanced ease of rinsing perceived by the consumer.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: June 8, 1999
    Assignee: The Procter & Gamble Company
    Inventors: Stefano Alfano, Giulia Ottavia Bianchetti, Franca Fabri, Luigi Pace