PETROLITE CORPORATION, LTD.

DEHYDRO

REAGENTS FOR IMPROVING THE ADHESION OF ASPHALT TO, AND PREVENTING OR INHIBITING THE STRIPPING OF ASPHALTS FROM, ROCK OR OTHER AGGREGATE;

MUD-EX

CHEMICAL REAGENT FOR CLEANING AND FOR REMOVING FROM A WELL OR FROM AN OIL-OR GAS-BEARING FORMATION IN A WELL MUD-LIKE SHEATHING OR COATING ON THE WELL WALL RESULTING FROM THE USE OF DRILLING FLUIDS IN THE DRILLING OPERATION, OR RESULTING FROM THE PRESENCE IN THE WELL, AT SOME OTHER TIME, OF FLUIDS CAPABLE OF PRODUCING SUCH SHEATHING OR COATING AND FOR PENETRATING THE FORMATION TO FACILITATE THE RETURN OF WATER TO THE HOLE WHETHER DERIVED FROM DRILLING MUD, COGNATE WATERS, OR ANY OTHER SOURCE;APPLICANT DISCLAIMS EXCLUSIVE RIGHT TO THE WORD MUD EXCEPT IN COMBINATION WITHTHE MARK AS SHOWN.;

PETROLITE

PETROLEUM WAXES;

TRET-O-LITE

CHEMICALS USED IN THE TREATMENT OF PETROLEUM EMULSIONS TO EFFECT THE RECOVERY OF THE VALUABLE OIL CONTENT OF SUCH EMULSIONS;TREAT LIGHT;