Patents by Inventor Helge Lien

Helge Lien 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).

  • Full history time-temperature indicator system
    Patent number: 7290925
    Abstract: A full-history time-temperature indicator system which is capable of exhibiting a time-temperature dependent and visually detectable chemical reaction, useful for monitoring the time and temperature exposure of food products. The system comprises an immobilized reactant, such as Fe3+, and a mobile reactant, such as Fe(CN)64-, initially contained in separate compartments, and separated by a sealing. The system is activated by removing a sealing between the compartments whereby the mobile reactant in a time-temperature dependent manner is brought into contact with the immobilized reactant resulting in a visually detectable reaction signal.
    Type: Grant
    Filed: October 9, 2000
    Date of Patent: November 6, 2007
    Assignee: TimeTemp AS
    Inventors: Per Olav Skjervold, Brit Salbu, Petter Hieronymus Heyerdahl, Helge Lien