Timer and storage condition indicator

Details Timer and storage condition indicator Timer and storage condition indicator

1981-04-17

1983-10-11

Yasich, Daniel M.

Signals and indicators

Indicators

Chemically activated type

116308, 368327, G01N 3132, G04F 100

Patent

active

044085575

ABSTRACT:
A timer and storage conditions indicator for indicating the passage of a predetermined length of time under predetermined ambient physical environmental conditions, in which a carrier mixture is contained in a relatively confined area above a base layer. An absorptive layer is disposed on the base layer and accepts the carrier mixture at a predetermined rate. A barrier means is disposed between the carrier mixture and the absorptive layer, and the removal of the barrier activates the timer. Transfer means such as a capillary tube or a second absorptive layer may be disposed between the carrier mixture and the first mentioned absorptive layer.

REFERENCES:
patent: 3055759 (1962-09-01), Busby et al.
patent: 3414415 (1968-12-01), Broad, Jr.
patent: 3520124 (1970-07-01), Myers
patent: 3677088 (1972-07-01), Lang
patent: 3954011 (1976-05-01), Manske
patent: 3962920 (1976-06-01), Manske
patent: 3967579 (1976-07-01), Seiter
patent: 4229813 (1980-10-01), Lilly et al.

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