Laboratory filters, namely, porous silicon nitride and porous silicon oxide membranes which are porous to function as substrates for the growth of biological tissues, and for the analysis and construction of engineered biomaterial

Laboratory filters, namely, porous nanocrystalline silicon membranes for the ultrafiltration of biological molecules, particles and fluids, the filtration of small organic and inorganic molecules and particles, and the filtration of liquids and gases; and laboratory filters, namely, porous nanocrystalline silicon membranes which are porous to function as substrates for the growth of biological tissues, and for the analysis and construction of engineered material