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US 4,256,038 AGranted
Perfluorocarbon vapor tagging of blasting cap detonators
AssigneeThe United States of America as represented by the United States Department of Energy
InventorsRussell N. Dietz, Gunnar I. Senum
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Abstract
A plug for a blasting cap is made of an elastomer in which is dissolved a perfluorocarbon. The perfluorocarbon is released as a vapor into the ambient over a long period of time to serve as a detectable taggant.
Claims8
In an explosive device comprising an electrical detonator having a shell containing detonating material, and means for sealing said shell, the improvement comprising:
- a mass of material containing a perfluorocarbon which is released over a period of time as a vapor taggant from said mass.
Dependencies are inferred from the claim text.