Resultant color step indicator

Details Resultant color step indicator Resultant color step indicator

1974-04-29

1976-05-18

Scovronek, Joseph

Chemistry: physical processes

Physical processes

Crystallization

23230B, 232303, 116114AM, G01N 3122, G01N 3316

Patent

active

039574369

ABSTRACT:
A resultant color step indicator for use in various diagnostic or analytic test procedures particularly useful in those involving qualitative and quantitative analysis, such as radioimmunoassay, where a number of steps must be accomplished consecutively in order to get a proper final measurement. The various reagents which must be consecutively added are colored with an inert coloring. The coloring does not enter into the chemical reaction that yields the test results. It serves only to combine or intermix with the other coloring to indicate which steps have been completed. As the test is run, each step in the procedure which involves the addition of a different colored reagent results in a color change in the test specimen and the resultant color of the test specimen indicates which steps in the procedure have been accomplished.

REFERENCES:
patent: 2061500 (1936-11-01), Brewer
patent: 2925333 (1960-02-01), Thompson
patent: 3062963 (1962-11-01), Douty
patent: 3483735 (1969-12-01), Packo
patent: 3733178 (1973-05-01), Eriksen
patent: 3862120 (1975-01-01), Orelup

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