Time-temperature indicator

Details Time-temperature indicator Time-temperature indicator

1976-03-08

1977-11-08

Queisser, Richard C.

Signals and indicators

Alarms

Fluid flow

73356, 116114Y, G01K 304, G01K 1112

Patent

active

040570290

ABSTRACT:
A time-temperature indicator having a time-temperature sensitive component including a layer of material which at temperatures above a predetermined transition temperature changes from an impermeable, psuedo-crystalline state to a permeable, liquid-crystalline state. A reactant material having a predetermined rate of diffusion through the layer at temperatures above its transition temperature is maintained out of contact with an indicator by the layer at temperatures below the transition temperature. A container for the time-temperature component includes a transparent face for viewing the time-temperature component. The container is adapted for attachment to an object, such as to the package of a time and temperature sensitive product to visually indicate the product has been exposed above a particular temperature far in excess of a certain period of time.

REFERENCES:
patent: 3065083 (1962-11-01), Gessler
patent: 3233459 (1966-02-01), Gleason et al.
patent: 3967579 (1976-07-01), Seiter

Affiliated with

Also associated with

Rating

Time-temperature indicator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Time-temperature indicator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time-temperature indicator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-224989