Patents by Inventor Guy Benassi

Guy Benassi 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).

  • Gas-permeable but liquid-impermeable polyolefin microporous films
    Patent number: 6676871
    Abstract: The invention concerns a method for producing a microporous film with strong isotropic tendency permeable to gases and impermeable to aqueous liquids, consisting of at least one layer, comprising the following successive steps: preparing a mixture consisting of a polyolefin matrix containing at least a polymer and at least a mineral and/or organic filler; extruding at least a ply by hot-casting the mixture; pre-stretching the ply with a drag roll; cooling and solidifying the pre-stretched ply, using the drag roll; drawing the solidified ply at sufficient temperature for forming the microporous film.
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: January 13, 2004
    Assignee: Ace S.A.
    Inventors: Guy Benassi, Christian Dubouchet, Michel Gillet, Guy Pinchard