Patents by Inventor Anita W. Yung Chu

Anita W. Yung Chu 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).

  • Sustained flavorant release composition, chewable structure incorporating same and method for making same
    Patent number: 5236721
    Abstract: A sustained flavorant release composition is provided for use in a chewable structure. The flavorant release composition comprises a continuous film of a homogenous dispersion of a liquid flavorant agent and polyvinyl acetate, in a weight ratio of the liquid flavorant agent to polyvinyl acetate of about 1:5 to about 5:1, respectively. A method of producing the flavorant release composition is also provided and includes admixing the polyvinyl acetate, which is dissolved is a volatile, nonreactive organic solvent, with the flavorant release agent at a temperature at which the flavorant release agent does not degrade, followed by solvent removal. The chewable structure includes the continuous film of the flavorant release composition and a gum base composition.
    Type: Grant
    Filed: February 12, 1992
    Date of Patent: August 17, 1993
    Assignee: Columbia Laboratories, Inc.
    Inventors: Anita W. Yung Chu, Joseph R. Robinson
  • Sustained flavorant release composition, method for making same and chewable structure incorporating same
    Patent number: 4992280
    Abstract: A sustained flavorant release composition is provided for use in a chewable structure. The flavorant release composition consists essentially of a homogenous dispersion of a liquid flavorant agent and polyvinyl acetate having a number average molecular weight of about 150,000 to about 200,000 daltons. The weight ratio of the liquid favorant agent to polyvinyl acetate is about 1:5 to about 5:1, respectively. A method of producing the flavorant release composition includes admixing the polyvinyl acetate, dissolved in a volatile, nonreactive organic solvent, with the flavorant release agent at a temperature at which the flavorant release agent does not degrade. The solvent is then removed. The chewable structure includes the flavorant release composition and a gum base composition.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: February 12, 1991
    Assignee: Columbia Laboratories, Inc.
    Inventors: Anita W. Yung Chu, Joseph R. Robinson