Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing
Reexamination Certificate
2006-06-27
2006-06-27
Wood, Elizabeth D. (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Inorganic settable ingredient containing
C106S805000, C106S806000, C106S809000, C106S812000, C106SDIG004, C507S100000, C507S103000, C507S106000, C507S107000, C507S108000, C507S119000, C507S128000, C507S142000, C507S143000, C252S070000, C166S293000, C166S302000, C405S266000, C405S267000
Reexamination Certificate
active
07067004
ABSTRACT:
Grout slurries are provided that have high thermal conductivities of greater than about 1.4 Btu/hr-ft-° F. and low hydraulic conductivities ranging from about 5×10−9 cm/s to about 1×10−8 cm/s. Such grout slurries comprise water and a grout composition that is available as a one-sack product. The grout composition includes calcium bentonite present in an amount of from about 15% to about 45%, sodium bentonite present in an amount of from about 15% to about 45%, silica flour present in an amount of from about 10% to about 35%, and flaked graphite present in an amount of from about 10% to about 75%, all by weight of the grout composition. Further, methods of installing a conduit such as a heat transfer loop in a hole in the earth include placing the conduit in the hole, forming the foregoing grout slurry, and placing the grout slurry in the hole adjacent to the conduit.
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Paper entitled “Thermally Conductive Cementitious Grouts For Geothermal Heat Pumps” by Brookhaven National Laboratory, undated but admitted to be prior art.
Foreign communication from a related counterpart application dated Jun. 17, 2005.
Chaney Paul K.
Matula Gary W.
McClain Toby N.
Conley & Rose, P.C.
Roddy Craig W.
Wood Elizabeth D.
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