Patents by Inventor Valerio Del Duca

Valerio Del Duca 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: 6482786
    Abstract: The present invention relates to a liquid bleaching composition comprising a peroxygen bleach, a zwitterionic betaine surfactant, a sulphonated hydrotrope, and a nonionic surfactant. This composition is suitable to deliver excellent stain removal performance and bleaching performance on various surfaces including fabrics and hard-surfaces, with improved physical stability, especially at low temperatures.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: November 19, 2002
    Assignee: The Procter & Gamble Company
    Inventors: Valerio Del Duca, Stefano Giunti, Nobuo Ishida
  • Patent number: 6475970
    Abstract: The present invention relates to a liquid or solid bleaching composition comprising a peroxygen bleach and an alkoxylated benzoic acid or a salt thereof. This bleaching composition shows excellent immediate chemical stability and excellent chemical stability upon storage. Furthermore, the present invention relates to a process of treating a fabric and/or a process of treating a carpet.
    Type: Grant
    Filed: May 10, 2001
    Date of Patent: November 5, 2002
    Assignee: The Procter & Gamble Company
    Inventors: Valerio Del Duca, Stefano Giunti, Milena Leone, Carlo Ricci, Luca Sarcinelli
  • Patent number: 6451064
    Abstract: Liquid multipurpose cleaning compositions comprising a peroxygen bleach, a surfactant that exhibits a foaming property in the presence of a peroxygen bleach and a foam reducing system and processes for using same are provided.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: September 17, 2002
    Assignee: Procter & Gamble
    Inventors: Valerio Del Duca, Carlo Ricci, Carla Scorsini
  • Patent number: 6448214
    Abstract: The present invention relates to a low viscosity, aqueous liquid composition suitable for bleaching and pretreating soiled fabrics. Such composition contains a peroxygen bleach, an ethoxylated nonionic surfactant, a zwitterionic betaine surfactant and a viscosity reducing agent. In addition to improved cleaning performance, such composition provides satisfactory fabric and color safety when used as a laundry pretreater.
    Type: Grant
    Filed: August 29, 2000
    Date of Patent: September 10, 2002
    Assignee: The Proctor & Gamble Company
    Inventors: Valerio Del Duca, Carlo Ricci, Roberto Scaramella
  • Publication number: 20020028757
    Abstract: A process of treating fabrics which comprises the steps of forming an aqueous bath comprising water, a conventional laundry detergent and a laundry detergent additive tablet and subsequently contacting said fabrics with said aqueous bath, wherein said laundry detergent additive tablet comprises an ion exchange resin. A disintegration benefit is provided to the tablet used in the process according to the present invnetion.
    Type: Application
    Filed: June 7, 2001
    Publication date: March 7, 2002
    Applicant: The Procter & Gamble Company
    Inventors: Andrea Esposito, Valerio Del Duca, Silvia Zanazzi
  • Patent number: 6316400
    Abstract: The present invention relates to a liquid bleaching composition comprising a peroxygen bleach and a salt free zwitterionic betaine surfactant. These compositions are suitable to deliver excellent stain removal performance and bleaching performance on fabrics, with improved safety to the fabrics and colors especially under pretreatment conditions.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: November 13, 2001
    Assignee: The Procter & Gamble Co.
    Inventors: Valerio Del Duca, Stefano Giunti, Sabina Antonioli
  • Patent number: 6310025
    Abstract: The present invention relates to a process for pretreating soiled fabrics with a liquid composition comprising a peroxygen bleach and a soil dispersing agent selected from the group consisting of an ethoxylated monoamine, an ethoxylated diamine, and ethoxylated polyamine, an ethoxylated amine polymer and mixtures thereof. This invention also discloses liquid compositions suitable for pretreating fabrics, comprising a peroxygen bleach, a surfactant, and a soil dispersing agent selected from the group consisting of an ethoxylated monoamine, an ethoxylated diamine, an ethoxylated polyamine, an ethoxylated amine polymer and mixtures thereof, said composition being formulated either as an emulsion or a microemulsion.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: October 30, 2001
    Assignee: The Procter & Gamble Company
    Inventors: Valerio Del Duca, Valentina Masotti, Stefano Scialla
  • Patent number: 6242407
    Abstract: The present invention relates to a liquid composition suitable for bleaching fabrics comprising a peroxygen bleach, from 0.001% to 10% by weight of the total composition of propyl gallate, and from 0.001% to 10% by weight of an antioxidant. These compositions are suitable for bleaching soiled fabrics, and especially pretreating fabrics while being safe to the fabrics and colors.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: June 5, 2001
    Assignee: The Procter & Gamble Company
    Inventors: Gabriella Bertacchi, Valerio Del Duca, Carlo Ricci, Roberto Scaramella
  • Patent number: 6235699
    Abstract: Liquid compositions having a pH up to 7 comprise from 0.01% to 20% by weight of the total composition of a peroxygen bleach, from 0.001% to 30% by weight of the total composition of an ethoxylated nonionic surfactant, from 0.001% to 20% by weight of a zwitterionic betaine surfactant at a weight ratio of the ethoxylated nonionic surfactant to the zwitterionic betaine surfactant of from 0.01 to 20. These compositions are suitable to deliver improved stain removal performance and improved bleaching performance on various inanimate surfaces.
    Type: Grant
    Filed: August 3, 1999
    Date of Patent: May 22, 2001
    Assignee: The Procter & Gamble Company
    Inventors: Valerio Del Duca, Dennis Gerard O'Sullivan, Carlo Ricci, Roberto Scaramella, Stefano Giunti, Sabina Antonioli
  • Patent number: 6071870
    Abstract: A liquid composition, comprising: (A) a peroxygen bleach, or a source thereof, (B) a liquid hydrophobic bleach activator, the liquid hydrophobic bleach activator being acetyl triethyl citrate, (C) a long chain acyl sarcosinate; (D) the composition having a pH from 0 to 6; and (E) the composition being formulated either as an emulsion or as a microemulsion.
    Type: Grant
    Filed: August 14, 1998
    Date of Patent: June 6, 2000
    Assignee: The Procter & Gamble Company
    Inventors: Valerio Del Duca, Stefano Scialla
  • Patent number: 6019797
    Abstract: Stains are removed from fabrics by means of metallo-hydroperoxides during an otherwise conventional laundering process. Hydroperoxides based on silicon, tin and antimony are used to effect stain removal without reducing the tensile strength of said fabrics.
    Type: Grant
    Filed: February 24, 1999
    Date of Patent: February 1, 2000
    Assignee: Procter & Gamble Company
    Inventors: Valerio Del Duca, Stefano Scialla, Giulia Ottavia Bianchetti
  • Patent number: 6001794
    Abstract: The present invention relates to the use of a liquid composition comprising a peroxygen bleach and a radical scavenger or mixtures thereof, for pretreating soiled fabrics before said fabrics are washed, for reducing the loss of tensile strength in said fabrics and/or for reducing the color damage of said fabrics. The present invention further encompasses a liquid composition suitable for pretreating soiled fabrics, said composition comprising a peroxygen bleach and a radical scavenging system.
    Type: Grant
    Filed: March 26, 1998
    Date of Patent: December 14, 1999
    Assignee: The Procter & Gamble Company
    Inventors: Valerio Del Duca, Carlo Ricci, Marina Trani
  • Patent number: 5968885
    Abstract: The present invention relates to liquid compositions comprising a peroxygen bleach, a liquid hydrophobic bleach activator and a polyhydroxy fatty acid amide surfactant according to the formula R.sup.2 --C(O)--N(R.sup.1)-Z, wherein R.sup.1 is H, or C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 hydrocarbyl, 2-hydroxy ethyl, 2-hydroxy propyl or a mixture thereof, R.sup.2 is C.sub.5 -C.sub.31 hydrocarbyl, and Z is a polyhydroxycarbyl having a linear hydrocarbyl chain with at least 3 hydroxyls directly connected to the chain, or an alkoxylated derivative thereof, said compositions being formulated either as an emulsion or a microemulsion. The present invention further encompasses a process for pretreating soiled fabrics with a liquid composition comprising such a polyhydroxy fatty acid amide surfactant, whereby improved stain removal performance is delivered.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: October 19, 1999
    Assignee: Procter & Gamble Co.
    Inventors: Valerio Del Duca, Stefano Scialla, Raffaele Scoccianti
  • Patent number: 5929012
    Abstract: A process for pretreating soiled fabrics prior to washing with a liquid composition comprising a peroxygen bleach, a nonionic surfactant, an anionic surfactant and a compound chelating copper and/or iron and/or manganese is provided. The liquid composition used in such process is also provided.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: July 27, 1999
    Assignee: Procter & Gamble Company
    Inventors: Valerio Del Duca, John Scott Park, Dario Rapisarda, Barry Stoddart, Marina Trani, Taher Iqbal Yousaf