Time-temperature integrating indicator

Details Time-temperature integrating indicator Time-temperature integrating indicator

1975-10-29

1976-12-07

Reese, Robert M.

Chemistry: physical processes

Physical processes

Crystallization

116114AM, 426 88, G01N 2106, G01N 2120, G01N 3122

Patent

active

039960072

ABSTRACT:
A pouch for containing the gas generating means in a Time-Temperature Indicator which comprises a rate controlling film formed into a sealed pouch having contained therein a frangible ampule containing the gas generating means, said ampule being enclosed in a porous medium, said medium containing an indicator composition responsive to the gas generated by the gas generating means, so as to indicate a color change thereby making the user aware that the gas ampule has been broken.

REFERENCES:
patent: 3420205 (1969-01-01), Morison
patent: 3695903 (1972-10-01), Telkes et al.
patent: 3768976 (1973-10-01), Hu et al.
patent: 3888631 (1975-06-01), Sturzinger

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