Membranes for use in medical apparatus made of synthetic or regenerated polymers in form of films, hollow fibers, tubings and pipings as well as bundles of the aforesaid hollow fibers, tubings and pipings in combination with textile threads; medical apparatus and instruments, namely, modules and filters for use in medical apparatus equipped with the aforesaid membranes and bundles, in the nature of hemodialysers, hemofiltration modules, hemodiafiltration modules, endotoxin removal filters, na...

Downhole fluids, namely, hydrocarbon fluids for use in stimulation, treatment, remediation, and servicing of oil and gas wells