Freeze-thaw indicator apparatus

Details Freeze-thaw indicator apparatus Freeze-thaw indicator apparatus

1977-12-05

1979-08-07

Yasich, Daniel M.

Signals and indicators

Indicators

Temperature responsive or compensating means

73358, 116207, G01K 1106

Patent

active

041634276

ABSTRACT:
Apparatus in which melting ice is used to activate a dye formation in producing a color indication of thawing.

REFERENCES:
patent: 2593566 (1949-01-01), Kamp
patent: 2662018 (1953-12-01), Smith
patent: 2762711 (1956-09-01), Zopf, Jr.
patent: 3082624 (1963-03-01), Renier
patent: 3177843 (1965-04-01), Geocaris
patent: 3220259 (1965-11-01), Beyer
patent: 3922917 (1975-12-01), Ayres
patent: 3929021 (1975-12-01), Pecorella
patent: 3996007 (1976-12-01), Fang et al.
patent: 4022149 (1977-05-01), Berger
patent: 4038873 (1977-08-01), Kimmel

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