04389217 is referenced by 65 patents and cites 17 patents.

A recording device is described, useful as an integrated time-temperature or radiation-dosage history indicator. The device contains a substrate having deposited thereon at least two indicating units, one being unreacted and representing zero time of exposure and the other unit being pre-reacted. Each unit is comprised of an acetylenic compound containing at least one --C.tbd.C--C.tbd.C-- group, capable of reacting by 1,4-addition polymerization thereby forming an end-point color after an irreversible, progressive color change upon thermal annealing or exposure to actinic radiation. The end-point color represents an integrated time-temperature history of thermal annealing or radiation-dosage history. Each unit is constructed such that the time required to form the end-point color by thermal annealing at a given temperature or for a known thermal history, or exposure to actinic radiation at a given average radiation dosage rate, is predetermined. A process is also described for using the device as well as an article having the device affixed thereto.

Title
Integrated time-temperature or radiation-dosage history recording device
Application Number
839542
Publication Number
4389217
Application Date
November 24, 1980
Publication Date
June 21, 1983
Inventor
Granville G Miller
Morristown
NJ, US
Gordhanbhai N Patel
Morris Plains
NJ, US
Ray H Baughman
Morris Plains
NJ, US
Agent
Gerhard H Fuchs
Alan M Doernberg
Kenneth E Stroup Jr
Assignee
Allied Corporation
NJ, US
IPC
G01T 1/08
G01T 1/02
G01N 31/00
G01K 11/12
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