Time duration indicator systems, and also products containing su

Details Time duration indicator systems, and also products containing su Time duration indicator systems, and also products containing su

1986-12-03

1990-05-01

Terapane, John F.

Compositions

Nonreactive analytical, testing, or indicating compositions

239 6, 239 35, 239 54, 239 60, B66D 304

Patent

active

049216368

ABSTRACT:
Time duration indicator systems comprising a porous inert carrier and a volatile liquid, capable of reversibly changing the visual properties of the carrier. Such indicator systems can be used for products having a limited duration of use or life.

REFERENCES:
patent: 2251058 (1941-07-01), Kirkman
patent: 3018611 (1962-01-01), Biritz
patent: 4157787 (1979-06-01), Schwartz
patent: 4248597 (1981-03-01), McNeely
patent: 4356969 (1982-11-01), Obermayer et al.
patent: 4408557 (1983-10-01), Bradley et al.
patent: 4550676 (1985-11-01), Francis
patent: 4583686 (1986-04-01), Martens et al.
patent: 4629330 (1986-12-01), Nichols
patent: 4643122 (1987-02-01), Seybold

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