Depletion indicator for controlled-release pesticide formulation

Details Depletion indicator for controlled-release pesticide formulation Depletion indicator for controlled-release pesticide formulation

1974-04-29

1977-12-13

Reese, Robert M.

Chemistry: physical processes

Physical processes

Crystallization

23232R, 23253TP, G01N 3122

Patent

active

040626490

ABSTRACT:
The end of the useful life of a controlled-release formulation containing a volatile phosphate ester pesticide is signalled visually by change in the color of an indicator matrix positioned relative to the formulation so as to contact a representative proportion of the pesticide vapors as they are emitted from the formulation.

REFERENCES:
patent: 2956073 (1960-10-01), Whetstone
patent: 3084658 (1963-04-01), Schell
patent: 3139328 (1964-06-01), Jacob
patent: 3681027 (1972-08-01), Smith
D. F. Heath, Organophosphorus Poisons, Pergamon Press, 1961, pp. 72, 73, 80, 81.

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