Chemical additives for drilling muds; Chemical additives for fracturing fluid for use in oil and gas wells; Chemical additives for oil well drilling fluid; Chemicals used in oil drilling; Drilling muds for use in oil well drilling; Proppant for use in oil well and gas well hydraulic fracturing operations

medical apparatus and instruments namely security device for medical fluid injectors

cartridges and cartridge holders for on-line sample extraction, concentration and clean-up for industrial and laboratory use