Patents by Inventor Betsy P. Kuo

Betsy P. Kuo 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: 6294210
    Abstract: A multilayer film comprises: a first layer comprising a first homogeneous ethylene/&agr;-olefin copolymer; a second layer comprising a polyolefin; and a third layer comprising a second homogeneous ethylene/&agr;-olefin copolymer. The second layer is between the first layer and the third layer, the second layer is chemically different from the first layer and the third layer, and the multilayer film has an oxygen transmission rate of from about 500 to 50,000 cc/m2/24 hr STP. Also disclosed are a process for making the film, a packaging process using the film, and a product packaged in the film. The film is especially suitable for the packaging of oxygen-sensitive products, such as lettuce, and exhibits exceptional hot tack seal strength.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: September 25, 2001
    Assignee: Cryovac, Inc.
    Inventor: Betsy P. Kuo
  • Patent number: 5962092
    Abstract: A multilayer film comprises: a first layer comprising a first homogeneous ethylene/alpha-olefin copolymer; a second layer comprising a polyolefin; and a third layer comprising a second homogeneous ethylene/aipha-olefin copolymer. The second layer is between the first layer and the third layer, the second layer is chemically different from the first layer and the third layer, and the multilayer film has an O.sub.2 -transmission rate of from about 500 to 50,000 cc/m.sup.2 /24 hr STP. One outer layer of the film comprises an antifog agent on the outer surface thereof. Also disclosed is a package made from the film. The film is especially suitable for the packaging of oxygen-sensitive products, such as lettuce, and resists fogging up on the inside surface of the film forming the package. Preferably, the package has printing on the outside surface of the film, with the print having good adhesion to the film.
    Type: Grant
    Filed: October 13, 1995
    Date of Patent: October 5, 1999
    Assignee: Cryovac, Inc.
    Inventors: Betsy P. Kuo, Mendy J. Walden
  • Patent number: 5849127
    Abstract: A multilayer film comprises: a first layer comprising a first homogeneous ethylene/.alpha.-olefin copolymer; a second layer comprising a polyolefin; and a third layer comprising a second homogeneous ethylene/.alpha.-olefin copolymer. The second layer is between the first layer and the third layer, the second layer is chemically different from the first layer and the third layer, and the multilayer film has an oxygen transmission rate of from about 500 to 50,000 cc/m.sup.2 /24 hr STP. Also disclosed are a process for making the film, a packaging process using the film, and a product packaged in the film. The film is especially suitable for the packaging of oxygen sensitive products, such as lettuce, and exhibits exceptional hot tack seal strength.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: December 15, 1998
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Betsy P. Kuo
  • Patent number: 5638660
    Abstract: A multilayer film comprises: a first layer comprising a first homogeneous ethylene/.alpha.-olefin copolymer; a second layer comprising a polyolefin; and a third layer comprising a second homogeneous ethylene/.alpha.-olefin copolymer. The second layer is between the first layer and the third layer, the second layer is chemically different from the first layer and the third layer, and the multilayer film has an oxygen transmission rate of from about 500 to 50,000 cc/m.sup.2 / 24 hr STP. Also disclosed are a process for making the film, a packaging process using the film, and a product packaged in the film. The film is especially suitable for the packaging of oxygen-sensitive products, such as lettuce, and exhibits exceptional hot tack seal strength.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: June 17, 1997
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Betsy P. Kuo
  • Patent number: 5491019
    Abstract: A multilayer film comprises: a first layer comprising a first homogeneous ethylene/.alpha.-olefin copolymer; a second layer comprising a polyolefin; and a third layer comprising a second homogeneous ethylene/.alpha.-olefin copolymer. The second layer is between the first layer and the third layer, the second layer is chemically different from the first layer and the third layer, and the multilayer film has an oxygen transmission rate of from about 500 to 50,000 cc/m.sup.2 /24 hr STP. Also disclosed are a process for making the film, a packaging process using the film, and a product packaged in the film. The film is especially suitable for the packaging of oxygen-sensitive products, such as lettuce, and exhibits exceptional hot tack seal strength.
    Type: Grant
    Filed: March 28, 1994
    Date of Patent: February 13, 1996
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Betsy P. Kuo