Abstract: The present invention provides a cap for a hermetically sealed container, said cap providing a visually observable indication of elapsed time from the opening of the seal of said container, said cap including means for releasing a chemical which effects a color change in a chamber formed therein, said chamber being provided with a transparent section for viewing the contents thereof and said released chemical effecting a cumulative color change of said section with time, the arrangement being such that manipulation of said cap to open said container and said seal effects activation of said releasing means.
Type:
Grant
Filed:
October 15, 1999
Date of Patent:
April 16, 2002
Assignee:
Profile Sol-Gel Ltd.
Inventors:
Michael Kagan, Ian M. Solomon, Amir Genosar, Gil Sat