OIL WELL DRILLING FLUIDS, OIL WELL CEMENT COMPOSITION, AND SLURRY OF WEIGHTING MATERIAL COMPRISING ILMENITE
- Application ID: EP11864609
- Status: █ The patent has been granted
This EP application has the IPC class C04 (CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES) and C09 (DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR). We found, that Engel Patentanwaltskanzlei, Dr. Solf & Zapf, Gille Hrabal, Weser & Kollegen, Etudes & Productions Schlumberger and 12 others are specialized in this combination either. For a similar patent, they might be a good choice.