0117390-A2 is referenced by 34 patents and cites 5 patents.

A new process is disclosed for successively measuring the environmental exposure of environmental indicating devices. Environmental indicating devices that may be measured by the new process include devices that have at least one variable region of reflectivity and at least one non-variable region of reflectivity. Upon exposure to chemical, radiation or time-temperature stimuli, the reflectivity of the variable region relative to the reflectivity of the non-variable region is correlated to an incremental change in the environmental exposure of an indicator device based upon a preestablished relationship between the relative reflectivity and the incremental change in the environmental exposure of the device.; The incremental change in the environmental exposure of the indicating device is then correlated to a remaining shelf-life or extent of processing value for a product that undergoes progressive quality changes upon exposure to environmental stimuli. Other information such as the identity of a product and/or of a material comprising the variable region of reflectivity may be read and determined by the correlation process.

Process for monitoring incremental environmental exposures of products that undergo progressive quality changes in response to environment stimuli.
Application Number
EP19840100030 19840103
Publication Number
0117390 (A2)
Application Date
January 3, 1984
Publication Date
September 5, 1984
Baughman Ray Henry
Chance Ronald Richard
Eckhardt Helmut
Grabiner Frederick Robert
Fields Stephen Carl
Prusik Thaddeus
G01K 03/04
G01D 01/04
G01N 33/02
G01N 31/22
G01N 17/00
G01K 03/00
C09K 03/00
G01N 21/77
G01N 33/02
G01N 31/22
G01N 21/81
G01N 21/78
G01N 17/00
G01K 03/04
C09K 03/00
G01N 21/77
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