Method and device for producing varying concentration patterns of chemically or biologically active substances
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United States of America Patent
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Jul 2, 1991
Issued Date -
N/A
app pub date -
Nov 9, 1989
filing date -
Apr 2, 1984
priority date (Note) -
Expired
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Abstract
A method and a device for producing predetermined and defined varying concentration patterns of chemically or biologically active substances in chemical or biological qualitative or quantitative determinative methods, the method comprising application of the substance(s) within part of or the whole of a rectangular area of a medium in a concentration pattern having at least one concentration maximum and one concentration minimum: the device comprising a rectangular carrier on which the substance(s) have been applied so that the concentration pattern(s) thereof exhibit at least one concentration maximum and one concentration minimum.
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