Abstract: A method for making an electrolyte permeable diaphragm, and the diaphragm thus produced, wherein an aqueous slurry, containing as its principal particulate ingredient a water-wettable, insert, micron-size, inorganic material, along with both polyfluoroethylene fibers and polyfluoroethylene dispersion, is drawn through a foraminous structure to form a diaphragm thereon.

Abstract: Method of and apparatus for exchanging heat between two fluids wherein a core member is composed essentially of vermicular expanded graphite which has been compressed primarily along one axis and heat is exchanged in the core member between the two fluids along an axis normal to the primary axis of compression of the core member.

Abstract: Method of and apparatus for exchanging heat between two fluids wherein a core member is composed essentially of vermicular expanded graphite which has been compressed primarily along one axis and heat is exchanged in the core member between the two fluids along an axis normal to the primary axis of compression of the core member.

Abstract: Method of supporting a preformed membrane in an electrolytic cell, and apparatus therefor, which comprises casting in situ support plates about the open edges of the membrane.

Abstract: The invention is an elongated tool for detachably connecting a sand screen and liner assembly to a tubing string. The tool comprises a releasing housing sleeve, a hookup nipple section which partly telescopes within the releasing housing sleeve with the telescoped end closed by a removable hookup nipple plug. A movable hollow piston having a ball valve seat at one end and a cross bore extending through its other end part fits within the other end of the releasing housing sleeve with the cross bore aligned with longitudinally extending slots in the releasing housing sleeve.The hookup nipple has circumferentially extending grooves near its upper end which each mate with an array of bores extending through the releasing housing sleeve. Ball detent elements are disposed in the bores and grooves.

Abstract: Disclosed is an improved cementing basket for use in cementing the borehole of oil wells or gas wells. In some of the conventional cementing baskets metal slats are used to form the rigid part of the basket petals. The basket of this invention utilizes a wire loop, such as steel spring wire, for the rigid member of the basket petal.