04276190 is referenced by 21 patents and cites 6 patents.

An improved process and device are described, for monitoring time-temperature histories of perishable articles, utilizing an inactive form of a diacetylene compound, incapable of undergoing a color change upon thermal annealing, but capable of conversion to an active form upon contacting an activating vapor. The active form is capable of undergoing a color change upon thermal annealing, as a result of solid state polymerization wherein the resulting color change is representative of the time-temperature history of thermal annealing. Specific active and inactive forms of diacetylenes useful in the improved process and device are also described.

Title
Process for monitoring time-temperature histories of perishables utilizing inactive form of diacetylene
Application Number
938174
Publication Number
4276190
Application Date
July 26, 1979
Publication Date
June 30, 1981
Inventor
Gordhanbhai N Patel
Morris Plains
NJ, US
Agent
Alan M Doernberg
Robert A Harman
Assignee
Allied Chemical Corporation
NJ, US
IPC
C09K 3/00
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