03932134 is referenced by 15 patents and cites 4 patents.

Temperature time integrating indicator device in which a gas generating material located at one end of the device and activated at time of use of the device is absorbed by an indicating wick extending in the device in a direction away from the gas source, which wick changes color to denote a time-temperature integral and hence the temperature history of a product, there being a gas barrier means extending along the longitudinal sides of the wick for inhibiting gas transport to insure that substantially all gas absorbed by the wick makes first contact with the wick at the end nearest the gas source thus precluding first gas contact with the wick at more remote location with consequent erroneous temperature history indication.

Title
Time-temperature integrating indicator device
Application Number
5/515165
Publication Number
3932134
Application Date
October 16, 1974
Publication Date
January 13, 1976
Inventor
Craig R Hof
Boonton
NJ, US
Shou Mean Fang
Lake Hiawatha
NJ, US
Agent
Anthony Lagani Jr
Assignee
Bio Medical Sciences
NJ, US
IPC
G01N 11/12
G01N 21/20
G01N 21/06
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