Mining or in situ disintegration of hard material – With separation of materials – Separation below surface of earth or water
Reexamination Certificate
2004-12-06
2008-11-11
Kreck, John (Department: 3672)
Mining or in situ disintegration of hard material
With separation of materials
Separation below surface of earth or water
C299S055000
Reexamination Certificate
active
07448692
ABSTRACT:
The present invention is directed to the separation of bitumen, such as by the Clark process or by a countercurrent de-sander, in an underground excavation machine, such as a tunnel boring machine.
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Drake Ronald D.
Kobler Michael Helmut
Watson John David
Kreck John
OSUM Oil Sands.Corp
Sheridan & Ross P.C.
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