Patents by Inventor Harry Stefanou

Harry Stefanou 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: 7459195
    Abstract: The present invention relates to tufted goods comprising a greige good having fibers tufted into a primary backing, a precoat which is adhered to the back surface of the greige good, and a flexible film which is laminated to the back surface of the precoat. The flexible film is treated via corona-discharge prior to being laminated to the precoat. This invention also relates to a process for producing tufted goods. This process comprises treating a flexible film via corona-discharge, contacting the treated flexible film with the uncured or partially cured back surface of a precoated greige good, and curing the article. Optional embodiments of this invention include having a foam layer between the precoat and the flexible film, or having a foam layer on the back surface of the flexible film. An alternate embodiment of this invention comprises substituting a foam layer for the precoat.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: December 2, 2008
    Assignee: Bayer Antwerpen Comm.V.
    Inventors: Ulrich B. Holeschovsky, Harry Stefanou
  • Publication number: 20060165951
    Abstract: The present invention relates to tufted goods comprising a greige good having fibers tufted into a primary backing, a precoat which is adhered to the back surface of the greige good, and a flexible film which is laminated to the back surface of the precoat. The flexible film is treated via corona-discharge prior to being laminated to the precoat. This invention also relates to a process for producing tufted goods. This process comprises treating a flexible film via corona-discharge, contacting the treated flexible film with the uncured or partially cured back surface of a precoated greige good, and curing the article. Optional embodiments of this invention include having a foam layer between the precoat and the flexible film, or having a foam layer on the back surface of the flexible film. An alternate embodiment of this invention comprises substituting a foam layer for the precoat.
    Type: Application
    Filed: March 24, 2006
    Publication date: July 27, 2006
    Inventors: Ulrich Holeschovsky, Harry Stefanou
  • Patent number: 7056407
    Abstract: The present invention relates to tufted goods comprising a greige good having fibers tufted into a primary backing, a precoat which is adhered to the back surface of the greige good, and a flexible film which is laminated to the back surface of the precoat. The flexible film is treated via corona-discharge prior to being laminated to the precoat. This invention also relates to a process for producing tufted goods. This process comprises treating a flexible film via corona-discharge, contacting the treated flexible film with the uncured or partially cured back surface of a precoated greige good, and curing the article. Optional embodiments of this invention include having a foam layer between the precoat and the flexible film, or having a foam layer on the back surface of the flexible film. An alternate embodiment of this invention comprises substituting a foam layer for the precoat.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: June 6, 2006
    Assignee: Bayer Antwerpen
    Inventors: Ulrich Holeschovsky, Harry Stefanou
  • Patent number: 7026031
    Abstract: The present invention relates to an improved process for the production of artificial turf, and the improved artificial turf. In accordance with this process, fibers are treated via corona discharge, tufted into a primary backing to form a greige good, and a precoat is applied to the back surface the greige good. Suitable fibers are polyolefins, and suitable precoats are reactive polyurethane mixtures. The fibers may be treated by corona discharge either before they are tufted into the primary backing to form the greige good or after the are tufted into the primary backing. Artifical turfs of the present invention comprise a greige good having fibers tufted into a primary backing, with the fibers being treated by corona discharge either before or after being tufted into the primary backing, and a precoat which is attached by its face surface to the back surface of the greige good.
    Type: Grant
    Filed: December 5, 2002
    Date of Patent: April 11, 2006
    Assignee: Bayer MaterialScience LLC
    Inventors: Ulrich B. Holeschovsky, Jeffrey L. Robbins, Harry Stefanou
  • Publication number: 20040109976
    Abstract: The present invention relates to an improved process for the production of artificial turf, and the improved artificial turf. In accordance with this process, fibers are treated via corona discharge, tufted into a primary backing to form a greige good, and a precoat is applied to the back surface the greige good. Suitable fibers are polyolefins, and suitable precoats are reactive polyurethane mixtures. The fibers may be treated by corona discharge either before they are tufted into the primary backing to form the greige good or after the are tufted into the primary backing. Artifical turfs of the present invention comprise a greige good having fibers tufted into a primary backing, with the fibers being treated by corona discharge either before or after being tufted into the primary backing, and a precoat which is attached by its face surface to the back surface of the greige good.
    Type: Application
    Filed: December 5, 2002
    Publication date: June 10, 2004
    Inventors: Ulrich B. Holeschovsky, Jeffrey L. Robbins, Harry Stefanou
  • Publication number: 20030134081
    Abstract: The present invention relates to tufted goods comprising a greige good having fibers tufted into a primary backing, a precoat which is adhered to the back surface of the greige good, and a flexible film which is laminated to the back surface of the precoat. The flexible film is treated via corona-discharge prior to being laminated to the precoat. This invention also relates to a process for producing tufted goods. This process comprises treating a flexible film via corona-discharge, contacting the treated flexible film with the uncured or partially cured back surface of a precoated greige good, and curing the article. Optional embodiments of this invention include having a foam layer between the precoat and the flexible film, or having a foam layer on the back surface of the flexible film. An alternate embodiment of this invention comprises substituting a foam layer for the precoat.
    Type: Application
    Filed: December 18, 2001
    Publication date: July 17, 2003
    Inventors: Ulrich Holeschovsky, Harry Stefanou
  • Patent number: 6328833
    Abstract: Tufted carpeting can be manufactured employing polyurethane adhesives and cured face up without dripping, when one or more drip-reducing process steps of adding a non-Newtonian thickener to the adhesive or forming a viscosified or cured film on the outer surface of the adhesive are practiced prior to entry of the greige good into the curing oven.
    Type: Grant
    Filed: February 6, 2001
    Date of Patent: December 11, 2001
    Assignee: Bayer Antwerp N.V.
    Inventors: Ulrich B. Holeschovsky, Jeffrey L. Robbins, Harry Stefanou, Leah Langsdorf, David Gibala, Robert R. Pollock
  • Patent number: 6299715
    Abstract: Laminated carpeting consisting of a secondary backing adhered to a greige good of yarn tufted into a primary backing are prepared from polyurethane adhesives by single puddle processes which allow for lowered use of polyurethane while producing carpets exhibiting excellent delamination strength. Preferably, a reactive polyurethane system is employed as a primary adhesive, and the secondary backing is skip-coated with a minor amount of a non-advancing skip coat.
    Type: Grant
    Filed: July 14, 1998
    Date of Patent: October 9, 2001
    Assignee: Bayer Antwerp N.V.
    Inventors: Leah J. Langsdorf, Jeffrey L. Robbins, Ulrich B. Holeschovsky, Harry Stefanou, Barry V. Evangelist, Robert D. Duffy, Gary L. Allen
  • Patent number: 6264775
    Abstract: Tufted carpeting can be manufactured employing polyurethane adhesives and cured face up without dripping, when one or more drip-reducing process steps of adding a non-Newtonian thickener to the adhesive or forming a viscosified or cured film on the outer surface of the adhesive are practiced prior to entry of the greige good into the curing oven.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: July 24, 2001
    Assignee: Bayer Antwerp N.V.
    Inventors: Ulrich B. Holeschovsky, Jeffrey L. Robbins, Harry Stefanou, Leah Langsdorf, David Gibala, Robert R. Pollock
  • Patent number: 4459634
    Abstract: This invention concerns a method for stabilizing polarized polymeric piezoelectric films wherein a polarized polymeric piezoelectric film is exposed to an electric field of reverse polarity to that employed in the polarization step for a period sufficient to remove unstable homo- and hetero-charges but insufficient to depolarize useful charges in the final film.
    Type: Grant
    Filed: October 22, 1982
    Date of Patent: July 10, 1984
    Assignee: Pennwalt Corporation
    Inventor: Harry Stefanou