Radiant energy – Invisible radiation responsive nonelectric signalling
Reexamination Certificate
2006-01-30
2009-02-17
Porta, David P (Department: 2884)
Radiant energy
Invisible radiation responsive nonelectric signalling
C250S370010, C250S390010, C438S056000, C365S205000
Reexamination Certificate
active
07491948
ABSTRACT:
A method of detecting and transmitting radiation detection information to a network. The method including: communicating with one or more personal radiation detection devices, each device including, a host memory, an event memory, a microprocessor, a global positioning unit and a transceiver or a transmitter; a radiation shield around the host memory and the event memory; a radiation detection memory, the radiation detection memory, responsive to alpha radiation and including two or more SRAM arrays including cross-coupled invertors coupled to wordlines through different value capacitors; a conversion device including a material able to convert neutron and/or gamma radiation into alpha radiation; and an event detection circuit configured to detect and to store data relative to detection of the alpha radiation events by the radiation detection memory; storing the data in the event memory; and retrieving, in a reading device of the network, the data stored in the event memory.
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Gordon Michael S.
Rodbell Kenneth P.
Wisnieff Robert L.
Green Yara B
International Business Machines - Corporation
Porta David P
Schmeiser Olsen & Watts
Trepp Robert M.
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