Patents by Inventor Luigi Perazzo

Luigi Perazzo 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).

  • Method of making a laminate
    Patent number: 5110390
    Abstract: Laminated sheet material 9 comprises a laminate of a polyvinyl alcohol or other water-disintegratable film 12 with a thin coextruded film comprising a melt-bondable layer 15 and an impermeable layer 14. The laminate is odor impermeable but water disposable and so can be used to form a toilet-disposable ostomy bag by melt-sealing around the edges 10 between the facing melt-sealable surfaces 15.
    Type: Grant
    Filed: October 12, 1989
    Date of Patent: May 5, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Francesco Martini, Luigi Perazzo
  • Noiseless polymeric film, and containers for medical use made thereof
    Patent number: 5043205
    Abstract: The film is formed by a composition comprising a mixture of 50-100 weight % of an ethylene-butyl-acrylate copolymer (EBA) having a content of butyl-acrylate (BA) of 5-50 weight %, and 0-50 weight % of an elastomeric polyolefin. Laminates comprising a layer constituted by said film have excellent characteristics of noiselessness and softness.
    Type: Grant
    Filed: July 20, 1989
    Date of Patent: August 27, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Luigi Perazzo, Francesco Martini
  • Laminated articles
    Patent number: 4906495
    Abstract: Laminated sheet material 9 comprises a laminate of a polyvinyl alcohol or other water-disintegratable film 12 with a thin coextruded film comprising a melt-bondable layer 15 and an impermeable layer 14. The laminate is odor impermeable but water disposable and so can be used to form a toilet-disposable ostomy bag by melt-sealing around the edges 10 between the facing melt-sealable surfaces 15.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: March 6, 1990
    Assignee: W. R. Grace & Co.
    Inventors: Francesco Martini, Luigi Perazzo
  • Multi-layer highly moisture and gas permeable packaging film
    Patent number: 4897274
    Abstract: A multi-layer highly moisture and gas permeable packaging film comprising a core layer of a butadiene-styrene copolymer with a styrene content of 60 to 80% by weight and at least two outer layers having heat sealable and gas permeability properties.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: January 30, 1990
    Assignee: W. R. Grace & Co.
    Inventors: Giovanni Candida, Luigi Perazzo
  • Manufacture of polymeric products
    Patent number: 4880592
    Abstract: HB polymers, such as copolymers of hydroxy butyric acid and hydroxy valeric acid, are provided as melt extruded films having a thickness of 5 to 200 .mu.m. Sheet materials may consist of such a film or the film may be laminated with other films to increase strength or impermeability. The films are best made by co-extrusion with a thermoplastic that is substantially non-tacky upon solidification. The sheet materials are of particular value as diaper backsheets and ostomy bags. They may include a layer of non-woven material.
    Type: Grant
    Filed: December 8, 1986
    Date of Patent: November 14, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Francesco Martini, Luigi Perazzo, Paolo Vietto
  • Sheets materials of HB polymers
    Patent number: 4826493
    Abstract: HB polymers, such as copolymers of hydroxy butyric acid and hydroxy valeric acid, are provided as melt extruded films having a thickness of 5 to 200 .mu.m. Sheet materials may consist of such a film or the film may be laminated with other films to increase strength or impermeability. The films are best made by co-extrusion with a thermoplastic that is substantially non-tacky upon solidification. The sheet materials are of particular value as diaper backsheets and ostomy bags. They may include a layer of non-woven material.
    Type: Grant
    Filed: August 13, 1987
    Date of Patent: May 2, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Francesco Martini, Luigi Perazzo, Paolo Vietto