Patents by Inventor Gregor B. Y. Christie

Gregor B. Y. Christie 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).

  • Temperature sensitive valve for atmosphere control for film packaged products
    Patent number: 5443851
    Abstract: Packaging apparatus and method, for use in controlled atmosphere packaging of horticultural produce in controlled permeability film. A valve apparatus mounted on or in a packaging film including a temperature sensitive sensor formed from a bimetallic or shape-memory material (2), or a chemical sensitive sensor formed from a swellable polymer, to actuate the valve member (pin or plug) (1) on, or in communication with the sensor. In use, after sealing the produce within the packaging film, the valve apparatus opens the packaging film in response to a temperature change of predetermined magnitude to allow oxygen flow for extension of storage life or fumigation of the produce.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: August 22, 1995
    Assignee: Commonwealth Scientific and Industrial Research Org.
    Inventors: Gregor B. Y. Christie, David Wexler, Terence W. Turney