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Spherelite Trademarks
SPHERELITE
Synthetic Proppants for oil and gas well fracturing
Abandoned
·
March 20, 2006
·
78841197
·
SPHERELITE
Cement additives used in oil and gas well drilling operations
Registered
·
March 10, 2008
·
77417799
·
SPHERELITE
A CEMENT ADDITIVE NAMELY A HOLLOW, FUSEDPRESSURE RESISTANT MINERAL BEAD USEFUL IN PRODUCING A LIGHT WEIGHT RAPID SETTING ADEQUATE COMPRESSIVE STRENGTH CEMENT
Abandoned
·
November 23, 1981
·
73338569
·
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