Sterile indicator device

Details Sterile indicator device Sterile indicator device

1982-05-24

1983-05-03

Turk, Arnold

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

116207, 374162, 422 58, 422 87, 436 1, G01N 2178, G01N 3300

Patent

active

043820638

ABSTRACT:
A sterility indicator device comprising a base of steam permeable, absorbent material, e.g. paperboard, having mounted thereon at least one, though preferably three separate indicator ink spots of chromium chloride that change color in response to predetermined combinations of time, temperature and saturated steam, impermeable transparent cover films bonded to the top surface of the base overlaying the indicator ink spots and to the bottom surface of the base thereby preventing the escape of corrosive reactants there through, and an adhesive substance, to be used to bond the impermeable cover films to the base.

REFERENCES:
patent: 2308087 (1940-01-01), Lappala
patent: 3002385 (1961-10-01), Wahl et al.
patent: 3620677 (1971-11-01), Morison
patent: 3684737 (1972-08-01), Emigh
patent: 3862824 (1975-01-01), Chapman
patent: 3975162 (1976-08-01), Renn
patent: 3981683 (1976-09-01), Larsson et al.
patent: 4138216 (1979-02-01), Larsson et al.
patent: 4240926 (1980-12-01), McNeely

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