Abstract: A device for continuous water pressure measurement in a hydrocarbon reservoir comprising a pressure sensor, a hydrophilic membrane positioned between a reservoir formation and the pressure sensor, the hydrophilic membrane having a surface area A, and a biasing device pushing the hydrophilic membrane against the reservoir formation with a force equal to, or larger than, the pressure difference between a hydrocarbon phase Po in the reservoir and the water (Po-Pw) multiplied with the probe membrane contact area. Methods of installing the device in a hydrocarbon reservoir are also disclosed.

Abstract: A probe (3) and a probe arrangement (1) for a pressure measurement of a water phase inside a hydrocarbon reservoir (12). The probe (3) comprises a body (5) comprising a pressure measuring chamber (7) and at least one opening (10) to the pressure measuring chamber (7), and a surface of the body (5) is arranged with a hydrophilic characteristic. The probe arrangement comprises a displacement mechanism (46) adapted to displace the probe from a first position, where the opening of the probe is located outside the reservoir, to a second position, where said at least one opening (10) of the probe (3) is located at a position inside the reservoir (12).

Abstract: A reverse-osmosis membrane filter comprising: a porous support layer; a porous skin layer, and at least one water binding composition predominantly bound between the skin layer and the support layer.

Abstract: A salt of a polymer, containing acid groups, soluble or dispersible in water or organic solvents, is combined with a salt-forming pharmaceutically effective compound for application, orally, topically, or systemically. A sustained release of the pharmaceutical compound is thus obtained.

Abstract: A composition comprising a copolymer of from 20 to 60 parts of at least one member selected from the class consisting of acrylic and methacrylic acids, from 20 to 70 parts of one member selected from the class of lower alkyl acrylates and lower alkyl methacrylates, and from 5 to 20 parts of a plasticizing monomer, in which at least some of the acid groups have been neutralized by multivalent cations, where a chemical, exclusive of water and plasticizer, releasable from a film of the referenced copolymer, is formed by casting and drying an aqueous solution of the copolymer containing the chemical.

Abstract: A method and device are provided which cause the distortion of a signature being made on a check, credit card slip, etc. The distortion provided allows for better verification of the signature. The distortion can be an elongation of the signature, reversal of the signature, or other suitable form of forming a non-standard signature by which the authenticity of the signature can be verified.

Abstract: A copolymer derived from a monomeric mixture comprising from 20 to 60 parts of acrylic or methacrylic acid, from 20 to 70 parts of a lower alkyl acrylate or methacrylate, and from 5 to 20 parts of a plasticizing monomer is at least partially neutralized by multivalent cations.

Abstract: Copolymers comprising acrylic or methacrylic acid and methyl methacrylate are neutralized by the addition of cyclic alkylene imines, preferably ethylene imine, to form a product which is capable of absorbing large amounts of material soluble in water, and slowly releasing those materials. The fundamental copolymer may be modified by the addition of cross-linking agents, chain terminators, plasticizers, etc., prior to treatment with the alkylene imine. The treated copolymers are particularly useful in the formation of contact lenses for the application of medicinals to the eye, and for other depot materials.