An osmotic dispenser comprised of (1) a water permeable membrane forming part or all of the walls of an enclosure surrounding (2) an active agent, and in some cases (3) an additional compound known as an osmotic attractant which together exhibits an osmotic pressure against water. When placed in an aqueous environment water is osmotically drawn into the enclosure by the combined action of the agents (2) and (3) which distends and swells the enclosure until the membrane or some other part of the ...

Solvent-resistant polybenzimidazole membranes, methods of making them and crosslinking them and composite membranes and hollow fiber membrane modules from them are disclosed.

A gas dehydration method and apparatus are disclosed which utilize lumen-side feed, thin-film which is highly permeable, such composite membranes being used in a module wherein the permeate flows countercurrent to the flow of the feed.

Nitrogen-absorbing and -desorbing compositions, novel ligands and transition metal complexes, and methods of using the same, which are useful for the selective separation of nitrogen from other gases, especially natural gas.

Bacteriorhodopsin materials and matrices are crosslinked with each other to enhance optical data storage lifetimes.

Plasma discharge reactors of various designs are disclosed; the reactors are capable of synthesizing large numbers of bioactive compounds of great chemical diversity.

Solvent-resistant polybenzimidazole membranes, methods of making them and crosslinking them and composite membranes and hollow fiber membrane modules from them are disclosed.

Controlled release dosage forms for low solubility drugs are disclosed wherein an amorphous solid dispersion of the drug is coated with a non-dissolving and non-eroding coating that controls the influx of water to the core so as to cause extrusion of a portion of the core, as well as a method of treating a disease or disorder comprising administering such dosage form to a person.

Membrane-based vapor permeation system for selective removal of a vapor from a fluid feed stream, wherein a countercurrent sweep stream is used that has a particular partial pressure of the vapor to be removed.

A durable and sprayable controlled release bead of active ingredient in the pores of a polymeric micro-porous bead having an anisotropic pore structure of large pores in the interior and small pores at the surface, the gradation of pore sizes between the interior and the surface being continuous.