The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 07, 2010
Filed:
Dec. 03, 2007
Wei-fang Su, Taipei, TW;
Yulia Galagan, Taipei, TW;
Wei-Fang Su, Taipei, TW;
Yulia Galagan, Taipei, TW;
Other;
Abstract
The present invention discloses a time passage indicating apparatus which comprises a substrate, a background layer on the substrate, and a time passage indicating layer on the background layer. The background layer and the time passage indicating layer bond to each other through a first and second polymer binder. The background layer diplays a background color. The time passage indicating layer displays an initial color in an initial state that is different from the background color, and a final color in a final state that is substantially the same as the background color, so as to indicate the end of a time period where the time passage indicating layer transforms from the initial state to the final state.