Patents by Inventor Lorena Silvaggi

Lorena Silvaggi 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).

  • Patent number: 6177395
    Abstract: Compositions particularly suitable for the cleaning of carpets comprise: a peroxygen bleach; an alcohol having the formula R—OH wherein R is linear or branched, saturated or unsaturated hydrocarbon chain of 1 to 4 carbon atoms and a second solvent selected from the group consisting of a hydrophilic solvent comprising one or more ether groups and having a solubility in water higher than 10 ml per 100 ml at 25° C.; a polyol hydrophilic solvent having a solubility in water higher than 10 ml per 100 ml at 25° C.; a hydrophobic solvent having a solubility in water lower than 10 ml per 100 ml at 25° C.; and mixtures thereof; at a weight ratio of said alcohol to said second solvent of 1:10 to 1:1.1. The compositions are particularly suitable for the cleaning of carpets, resulting in improved overall stain removal performance, especially on particulate stains, greasy/oily stains, bleachable stains, and/or enzymatic stains.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: January 23, 2001
    Assignee: The Procter & Gamble Company
    Inventors: Lorena Silvaggi, Floriana Raso
  • Patent number: 6008175
    Abstract: A method of cleaning carpets with a composition comprising a surfactant selected from amine oxides and acyl sarcosinates. The compositions are advantageous in that they do not leave a dulling film if not removed from the carpet after drying. Preferably, the compositions also contain a source of active oxygen for stain removal.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: December 28, 1999
    Assignee: The Proctor & Gamble Company
    Inventors: Stefano Scialla, Floriana Raso, Lorena Silvaggi