Chemistry: analytical and immunological testing – Process or composition for determination of physical state... – Leak detection
Patent
1986-07-14
1988-11-15
Richman, Barry S.
Chemistry: analytical and immunological testing
Process or composition for determination of physical state...
Leak detection
73 52, 252960, 252964, G01M 320, G01N 3122
Patent
active
047849592
ABSTRACT:
A method of and apparatus for detecting fuel leaks employing color variable indicators. The method comprises the steps of preparing and applying a water soluble non-staining indicator dye to a test surface, observing color changes indicative of hydrocarbon leaks and removing the indicator dye from the test surface. The apparatus comprises in combination means for preparing the indicator dye, means for applying the indicator dye to the test surface and means for removing the dye from the test surface. The indicator dye comprises a major portion of a dry inert mineral carrier from about 0.1 to about 5.0 weight percent of a direct dye which is non-staining on painted surfaces and which does not migrate into or penetrate polyurethane or epoxy resin base painted surfaces, and from 0.1 to about 1.0 weight percent of a surfactant.
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patent: 4517224 (1985-05-01), Ditty
patent: 4615828 (1986-10-01), Wegrzyn
Johnston Jill
Katz Eric R.
Lockheed Corporation
Richman Barry S.
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