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Sandfrac Trademarks
SANDFRAC
CHEMICAL COMPOSITIONS USEFUL IN THE TREATMENT OF WELLS AND UNDERGROUND EARTH FORMATIONS
Expired
·
February 14, 1964
·
72186705
·
SANDFRAC
WELL TREATING SERVICES-NAMELY, HYDRAULIC FRACTURING OF UNDERGROUND EARTH FORMATIONS AND PROPPING OPEN THE RESULTING FRACTURES
Expired
·
November 26, 1952
·
71638639
·
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