Carbon black lubricating grease

Claim 1

A LUBRICATING GREASE COMPRISING A MAJOR PROPORTION OF MINERAL LUBRICATING OIL THICKENED TO A GREASE CONSISTENCY WITH A COMBINATION OF 3-30% BY WEIGHT, BASED ON TOTAL GREASE, OF CARBON BLACK AND 1.5-10% BY WEIGHT, BASED ON TOTAL GREASE OF ALUMINUM SOAP, SAID CARBON BLACK HAVING A SURFACE PH VALUE NOT GREATER THAN 5.0 AN AVERAGE PARTICLE DIAMETER BELOW ABOUT 20 MICRONS AND A VOLATILE MATTER CONTENT OF AT LEAST 5% BY WEIGHT, SAID GREASE CONTAINING FROM ABOUT 6-15% BY WEIGHT, BASED ON TOTAL GREASE, OF AN EXTREME PRESSURE ADDITIVE COMPOSED ESSENTIALLY OF ABOUT 5-10% BY WEIGHT, BASED ON TOTAL GREASE, OF SULFURIZED SPERM OIL, ABOUT 1-5% BY WEIGHT, BASED ON TOTAL GREASE, OF A FREE HIGH MOLECULAR WEIGHT FATTY ACID AND ABOUT 0.1-2% BY WEIGHT, BASE ON TOTAL GREASE, OF AN OILSOLUBLE PHOSPHATE ESTER SELECTED FROM THE GROUP CONSISTING OF TRICRESYL AND TRIBUTYL PHOSPHATES, SAID SULFURIZED SPERM OIL, FATTY ACID AND PHOSPHATE ESTER BEING PRESENT IN A WEIGHT RATIO OF ABOUT 9:2:0.5-1, REPRECTIVELY.