03999946 is referenced by 146 patents and cites 5 patents.

Compositions containing at least two conjugated acetylene groups (-C.tbd.C-C.tbd.C-) are suitable as integral time-temperature history indicators. These compositions exhibit sequences of irreversible color changes at combinations of times and temperatures specific to each composition. Thus, when supported on the surface of a product or on a substrate affixed to a product, they are useful for indicating whether a perishable (e.g., foodstuff, pharmaceutical, chemical, etc.) has been exposed to an undesirable time-temperature history that results in substantial degradation of the perishable or whether a product has been exposed to a desirable time-temperature history during processing (e.g., the sterilization of a foodstuff or biomedical material).

Title
Time-temperature history indicators
Application Number
5/660562
Publication Number
3999946
Application Date
February 23, 1976
Publication Date
December 28, 1976
Inventor
Ray H Baughman
Morris Plains
NJ, US
Anthony F Preziosi
Ledgewood
NJ, US
Gordhanbhai N Patel
Morris Plains
NJ, US
Agent
Ernest A Polin
David W Collins
Assignee
Allied Chemical Corporation
NJ, US
IPC
G01N 31/22
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