Thermal measuring and testing – Temperature measurement – Nonelectrical – nonmagnetic – or nonmechanical temperature...
Patent
1985-04-02
1987-02-17
Frankfort, Charles
Thermal measuring and testing
Temperature measurement
Nonelectrical, nonmagnetic, or nonmechanical temperature...
116206, 374162, 422 55, 422 57, 422 61, 436 2, 436164, 426 88, G01K 1106, G01D 2100
Patent
active
046435883
ABSTRACT:
A method of monitoring if a stored product has exceeded a predetermined temperature using an assembly, which comprises coated onto a carrier a gelatin layer containing an acidic reactant, color former and an encapsulated non-aqueous solvent.
REFERENCES:
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patent: 3774450 (1973-11-01), Godsey
patent: 3888631 (1975-06-01), Sturzinger
patent: 3946611 (1976-03-01), Larsson
patent: 4003245 (1977-01-01), Ogata et al.
patent: 4120818 (1978-10-01), Swindells et al.
Barber Roy P.
Postle Stephen R.
Ciba-Geigy AG
Frankfort Charles
Worth W. Morris
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