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United States of America Patent
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Jun 18, 1996
Issued Date -
N/A
app pub date -
Jul 20, 1994
filing date -
Sep 20, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A timer comprising a lamination containing a piece of porous wick material 1, and a reservoir of liquid 6, said liquid 6 and/or said porous wick 1 being such that when the reservoir is opened and the liquid 6 released it soaks into the porous wick 1 to thereby create a visible trace of the liquid on or in the porous wick; a face part 2 of the lamination being transparent such that said visible trace can be seen; said wick material 1 having imposed thereon or positioned adjacent thereto a series of markings which cover the time range over which the timer is to be used. The invention also provides a method of manufacturing the timer.
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