Patents by Inventor Steven L. Stafford

Steven L. Stafford 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).

  • Polyamide concentrate useful for producing blends having improved flavor retaining property and clarity
    Patent number: 5340884
    Abstract: This invention relates to a polyester/polyamide blend having an excellent gas barrier property and an improved flavor retaining property, and clarity. More particularly, the present invention relates to a polyethylene terephthalate/low molecular weight polyamide blend having an excellent gas barrier property, in which by reducing the concentration of acetaldehyde contained in the polyester, the storage property of a food or the like and the flavor-retaining property and fragrance retaining property are highly improved without producing haze.
    Type: Grant
    Filed: September 13, 1993
    Date of Patent: August 23, 1994
    Assignee: Eastman Kodak Company
    Inventors: David E. Mills, Steven L. Stafford
  • Copolyester/polyamide blend having improved flavor retaining property and clarity
    Patent number: 5266413
    Abstract: This invention relates to a copolyester/polyamide blend having an improved flavor retaining property and clarity. More particularly, the present invention relates to an essentially noncrystalline copolyester containing poly(ethylene terephthalate) units blended with a critical amount of a nonhydroxyfunctional polyamide. The use of a nonhydroxyfunctional polyamide in a critical amount reduces the concentration of acetaldehyde contained in the poly(ethylene terephthalate) copolyester, and thus, improves the storage property, flavor retaining property, and fragrance retaining property of a food or the like.
    Type: Grant
    Filed: May 18, 1992
    Date of Patent: November 30, 1993
    Assignee: Eastman Kodak Company
    Inventors: David E. Mills, Steven L. Stafford
  • Polyester/polyamide blend having improved flavor retaining property and clarity
    Patent number: 5258233
    Abstract: This invention relates to a polyester/polyamide blend having an excellent gas barrier property and an improved flavor retaining property and clarity. More particularly, the present invention relates to a polyethylene terephthalate/low molecular weight polyamide blend having an excellent gas barrier property, in which by reducing the concentration of acetaldehyde contained in the polyester, the storage property of a food or the like and the flavor-retaining property and fragrance retaining property are highly improved without producing haze.
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: November 2, 1993
    Assignee: Eastman Kodak Company
    Inventors: David E. Mills, Steven L. Stafford
  • Polyester from hydroxyethoxyphenoxy acetic acid with improve gas barrier properties
    Patent number: 4956443
    Abstract: Polyester resins useful for forming containers having improved resistance to gas permeability comprised of recurring units corresponding to the structure ##STR1## wherein R is selected from the group consisting of ##STR2##
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: September 11, 1990
    Assignee: Eastman Kodak Company
    Inventors: James R. Overton, Steven L. Stafford, Charles E. Sumner, Jr.