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Petrojel Trademarks
PETROJEL
CHEMICAL COMPOSITIONS-NAMELY, THICKENERS, USED IN THE HYDRAULIC STIMULATION OF WELLS AND UNDERGROUND EARTH FORMATIONS
Expired
·
September 8, 1964
·
72201393
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PETROJEL
WELL TREATING SERVICES-NAMELY, HYDRAULIC FRACTURING OF UNDERGROUND EARTH FORMATIONS WITH MIXTURES OF OIL AND SAND
Expired
·
April 2, 1956
·
72005607
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