VERTAN
Filed: January 8, 1953
SODIUM SALT OF A SYNTHETIC AMINO ACID
Owned by: DOWELL SCHLUMBERGER INCORPORATED
Serial Number: 71640490
PETROJEL
Filed: September 8, 1964
CHEMICAL COMPOSITIONS-NAMELY, THICKENERS, USED IN THE HYDRAULIC STIMULATION OF WELLS AND UNDERGROUND EARTH FORMATIONS
Owned by: DOWELL SCHLUMBERGER INCORPORATED
Serial Number: 72201393
LITEPOZ
Filed: September 8, 1964
POZZOLANA CEMENTS AND POZZOLANA INGREDIENTS FOR CEMENTS
Owned by: DOWELL SCHLUMBERGER INCORPORATED
Serial Number: 72201396
REDIFRAC
Filed: August 18, 1965
THICKENERS FOR ADDITION TO FLUIDS FOR THE TREATMENT OF WELLS AND UNDERGROUND EARTH FORMATIONS
Owned by: DOWELL SCHLUMBERGER INCORPORATED
Serial Number: 72225938
VERTAN
Filed: December 4, 1969
SODIUM SALT OF A SYNTHETIC AMINO ACID; CHELANT COMPOSITIONS FOR PREVENTION OF SCALE DEPOSITION
Owned by: DOWELL SCHLUMBERGER INCORPORATED
Serial Number: 72345314
STRATAFRAC
Filed: April 9, 1980
Chemical Compositions Used to Stimulate Production of Oil and Gas from Subterranean Formations
Owned by: DOWELL SCHLUMBERGER INCORPORATED
Serial Number: 73257412
GREASED LIGHTNIN
Filed: February 2, 1984
DRILLING FLUIDS AND CHEMICAL ADDITIVES TO DRILLING FLUIDS
Owned by: DOWELL SCHLUMBERGER INCORPORATED
Serial Number: 73463873
PARABAN
Filed: March 24, 1986
TREATMENT FOR PARAFFIN REMOVAL AND INHIBITION OF PARAFFIN DEPOSITION IN OIL AND GAS CONVEYING APPARATUS, NAMELY OIL AND…
Owned by: DOWELL SCHLUMBERGER INCORPORATED
Serial Number: 73589666
