Abstract: A magnetic recording medium comprising a substrate, a ferromagnetic thin film formed on the substrate, and a protective film formed directly on the ferromagnetic think film, and a process for producing such magnetic recording medium. The expression "formed directly" refers to the technique for forming the protective film on the ferromagnetic thin film so that the interface therebetween is free from contamination by, for instance, conducting the protective film formation under the vacuum used when forming the ferromagnetic thin film.

Abstract: Disclosed is a magnetic recording medium having a magnetic layer comprising a vinyl chloride copolymer as a binder and a magnetic powder and formed on a non-magnetic support. The vinyl chloride copolymer contains a hydroxyl group and a quaternary ammonium salt, wherein the hydroxyl group is derived from a monoallyl or monomethallyl ether of a polyhydroxyl compound, or a monoallyl or monomethallyl thioether of a polyhydroxyl compound. The vinyl chloride copolymer may further contain a hydrophilic group derived from at least one monomer which is selected from carboxylic acids, sulfur-containing acids, phosphorus-containing acids and salts thereof.

Abstract: A dispensing device is disclosed for delivering a beneficial agent. The device comprises (1) a housing defining an internal space, (2) an expandable composition comprising a dense member in the space, (3) a composition comrising a beneficial agent and a non-toxic heat responsive carrier in the space, and (4) a passageway in the housing for delivering the beneficial agent from the dispensing device.