Time indicator
US5699326A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1991 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Oct 4, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F3/207
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A time indicator comprising a front part and a rear part, the rear part comprising an ink pattern layer overlaying a rear support member. The front part comprises a transparent front support layer, and an opaque adhesive layer having a front ink display surface, the adhesive layer capable of dissolving the ink pattern on the rear part, whereby contacting the front part with the rear part by applying the opaque adhesive layer onto the ink pattern layer activates the dissolution and migration of ink in a selected time interval from the ink pattern layer, through the opaque adhesive layer to the front ink display surface for viewing through the transparent front support layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.