Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2006-11-07
2006-11-07
Tweel, Jr., John (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C324S300000, C324S727000
Reexamination Certificate
active
07132942
ABSTRACT:
A method and apparatus for screening samples to determine which samples include a target material. Generally, the samples are pre-screened to determine which of the samples have a piezoelectric resonance when irradiated with an electric field, to thereby indicate the presence of the target material. The samples that have the piezoelectric resonance are then further screened by a different process to confirm the presence of the target material. For example, samples that have the piezoelectric resonance are further screened for a specific nuclear quadrupole resonance (NQR), a specific nuclear magnetic resonance (NMR) or a specific visual characteristic, to confirm the presence of the target material in the sample. The apparatus and method can be used, for example, to search luggage at ports of entry for the presence of cocaine hydrochloride or heroin hydrochloride.
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Buess Michael L.
Garroway Allen M.
Lindquist Roy P.
Miller Joel B.
Yesinowski James P.
Karasek John J.
Ressing Amy
The United States of America as represented by the Secretary of
Tweel , Jr. John
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