Abstract: Silica supported high activity olefin polymerization catalysts, methods of producing the catalysts and methods of using the catalysts in the polymerization of olefins are provided. The methods of producing the catalysts each basically comprise contacting a particulate silica support impregnated with tungsten oxide with the soluble complex produced by heating a mixture of a metal dihalide with a transition metal compound to produce a solid, and then reacting the solid with an organoaluminum halide. The catalysts produced have improved productivities and are less soluble in polymerization media.

Abstract: A single ply reinforced thermoplastic composite which may be annealed in a predetermined shape. At least one layer of plastic material is impregnated on a layer of reinforcing material to form a single flexible ply. The ply is formed to the predetermined shape, such as a roll, and annealed in that shape such that the ply returns to the shape when released after being extended therefrom. One preferred thermoplastic material is polyphenylene sulfide. The sheet is well adatped for applications such as aircraft window shades. A method of manufacturing such a composite sheet is also disclosed.

Abstract: Articles are blow-molded from a polyphenylene sulfide resin having a melt flow in a range of from about 1 to about 10 g/10 min., and preferably in a range of from about 4 to about 8 g/10 min. When filler materials such as mica are added, the upper end of the acceptable melt flow range is raised to about 15 g/10 min. By maintaining mold temperatures in a range of from about 250.degree. to about 400.degree. F., and preferably from about 275.degree. to about 325.degree. F., the polyphenylene sulfide material in the blow-molded article is provided with a semi-crystalline structure, and is dimensionally stable at temperatures of at least 500.degree. F. Filler materials are preferably provided in a range of from about 10 to about 20 weight percent.

Abstract: A safety syringe having both apparatus for shielding the needle and apparatus for removing the needle after it is used. The apparatus for removing the needle is an elongated member that includes means for grasping the needle and removing it from the syringe body. An elongated cavity is disposed in the extension arm extending from the piston member of the syringe for receiving and storing the apparatus for removing the needle. The apparatus for shielding the needle is a cylindrical member that is attached over the syringe body and movable to and from an extended position over the needle. The safety syringe prevents inadvertent exposure of the needle prior to, during and after use of the syringe.

Abstract: A catalytic hydrogenation process for converting maleic anhydride and/or succinic anhydride to gamma-butyrolactone, a novel selective catalyst for use in such process and a method of preparing the catalyst are provided. The process comprises contacting maleic anhydride and/or succinic anhydride with hydrogen in the presence of catalysts whereby the anhydride is converted to predominantly gamma-butyrolactone. The catalyst of the invention is comprised of transition metals, their oxides and mixtures thereof on a silica gel support having a high surface area and pore volume.

Abstract: A moon clock for indicating a phase of the moon. The moon clock comprises a moon disk rotatable about a central axis having moon representation means and a continuous scale disposed on the front surface thereof, drive means for rotating the moon disk at a rate corresponding to the rate of the lunar orbit, marker means for marking a position of the moon representation means that indicates a phase of the moon at a given time and for marking a division of the continuous scale, and a stationary vernier scale positioned adjacent to the continuous scale for measuring a fractional part of the division of the continuous scale marked by the marker means. Also provided is a tide clock for indicating a state of the tide.

Abstract: A mobile promotional vehicle includes a tractor cab having an elongated, substantially horizontally extending bed connected thereto. An information display superstructure extends upwardly from the bed and includes side walls which converge as they progress from the rear of the bed forwardly in the direction of the cab. These side walls are joined by a top wall, and by a vertically extending rear wall. This allows the outer surface of the side walls to be better illuminated and more visible. Multiple display panels are stored inside the side walls and can be quickly transferred to an exposed, display position in juxtaposition to the outer surface of the side walls.

Abstract: The present invention provides a method of injecting nutrients into a subterranean formation in order to achieve a desired in-situ microbial objective. Sources of individual nutrient components which are deficient in the formation are sequentially injected so that a complete nutrient medium capable of sustaining substantial microbial activity is formed in the formation upon injection of the last of said sources. Said sources are preferably injected into the formation in order of decreasing quantitative formation retainability.

Abstract: An improved low pressure reverse buckling rupture disk and assembly are provided. The rupture disk comprises a concave-convex reversible member having a thickness and a configuration such that said member reverses when a predetermined fluid pressure is exerted on the convex side thereof and having one or more reinforcing embossments disposed therein. The rupture disk assembly includes the above-described rupture disk and knife blade means for severing the disk upon its reversal.

Abstract: A composition which forms a corrosion-inhibiting film when applied to a metal surface. The composition comprises a low molecular weight polyfunctional polymer formed by polymerizing a vinyl monomer in the presence of a mercaptan chain transfer agent. In one embodiment, the composition comprises a low molecular weight polyfunctional polymer represented by the general formula: ##STR1## wherein M is a repeating vinyl monomer unit, n is from about 2 to about 40, x is from 0 to about 10, y is from 0 to 1, z is from 0 to 1 if y is 0 and 0 if y is 1 and R is hydrogen, an alkyl group, a hydroxy alkyl group or an alkoxy group. A method of treating a metal surface by contacting the metal surface with a composition that forms a corrosion-inhibiting film thereon is also provided. The composition and methods are useful for inhibiting corrosion of downhole metal surfaces present in oil and gas wells.

Abstract: A three-phase transformer includes six windings, disposed in three pairs, all of which six windings are serially interconnected. A desired turns ratio between the two windings of each pair establishes a desired phase shift between one three-phase output of the connected windings and a second three-phase output of the windings. These two windings can be used in combination to drive a load, such as an induction motor, such as through a twelve pulse rectifier requiring two three-phase outputs out of phase by 30.degree.. Alternately, one of the three-phase outputs can be used to supply the full load of the motor directly. This is particularly useful in a electric submersible pumping system having a three-phase induction motor which is normally operated by a maintenance intensive twelve-pulse rectifier, which motor needs to be directly driven through a by-pass motor controller when the rectifier is in maintenance.

Abstract: A method for removing particulate solids, such as catalyst fines, from a hot slurry oil having a gravity of 5.degree. API to 15.degree. API, an atmospheric pressure initial boiling point of from about 500.degree. F. to about 750.degree. F. and an atmospheric pressure end point of less than 1,000.degree. F. which entails mixing a preselected amount of the slurry oil with a preselected amount of a hot vacuum reduced crude oil having equilibrium flash vaporization characteristics such that when the mixture is subjected to a selected temperature in a vacuum tower maintained at a vacuum of from about 1.0 mm Hg to about 10.0 mm Hg, at least 85 volume percent of the slurry oil will be flashed overhead and not more than about 15% of the vacuum reduced crude oil will be flashed overhead, and the particulate solids will remain in the liquid bottoms.

Abstract: A safe, dry storage compartment for use in combination with a jet ski water craft, the compartment being adapted for secure affixure to the top surface of a jet ski guide arm. The compartment consists of a mounting structure that is adapted for secure affixure to the guide arm and which is further formed to include a storage container of elongate volume. A hinged container cover is then secured over the elongate container opening and locked closed in sealed relationship to protect personal valuables, dry matter and the like stored within the compartment container.

Abstract: Improved methods of correcting the vertical permeability contrast of a subterranean formation to improve the sweep efficiency of waterflooding operations carried out therein wherein the subterranean formation contains at least one high permeability zone lying adjacent and in fluid communication with at least one low permeability zone are provided. In accordance with the methods, a near well bore portion of the high permeability zone is plugged and a crosslinked gel is formed at least at the boundary between the low permeability zone and the high permeability zone whereby fluid communication between the zones is reduced.

Abstract: A muffler for muffling engine operating sound and including a double-walled cylindrical shell closed at opposite ends by double-walled closure caps. The space between the shell walls is filled with sound-absorbing solid particles. The shell is partitioned into three axially contiguous chambers. A gas charging pipe projects through one closure cap and axially within the shell, and has two pairs of facing discharge elbows for discharging gas from the charging pipe at locations in the first chamber. A first pair of gas transfer pipes extends from the first chamber into the central chamber to points of opposed gas discharge. A second pair of gas transfer pipes extends from the central chamber into the third or discharge chamber, and from this location, the gas passes out of the muffler via a discharge pipe.

Abstract: This invention provides a method for producing high temperature aromatic sulfide polymers which are well suited for use as base compounds in conductive applications. In the method of the present invention, sulfur and a bridged diaromatic reactant compound are reacted in an inert polyhaloaromatic solvent and in the presence of a strong Friedel-Crafts metallic halide catalyst. One novel polymer produced by the method of the present invention is poly(phenoxathiinyl sulfide).

Abstract: A clean-out tool system for use with a oil well production tubing extending downward through a casing terminating in a production zone in the well bore, which zone is isolated by a packer and includes flow restricting debris to be cleaned out. A generally vertical, elongated, cylindrical tool body, having a relatively small diameter and a bore therein, is located down through the inner production tubing into the zone located at the end of a tubing string extending downward through the production tubing for communicating fluid pressure to the bore in the body. Four, peripherally spaced, elongated slots extend radially inward into the body with their longitudinal axes aligned with the longitudinal axis of the body and communicate with the bore is the body. An elongated blade is pivotally attached in each slot to the body, movable from a first configuration wherein the blade is positioned vertically within the slot, and a second, expanded configuration positioned radially outward in the zone.

Abstract: Olefin polymerization catalysts, processes for preparing the catalysts and processes for producing polyolefins utilizing the catalysts are provided. The catalysts are basically comprised of a pentadienyl derivative-transition metal complex adsorbed on an activated inorganic refractory compound.

Abstract: A sewing machine includes, and can have attached thereto, a synchronizing apparatus by which a presser foot bar and a feed foot bar, and the respectively connected presser foot and feed foot, are lifted and lowered in synchronization with the vertical reciprocation of a needle bar to which a stitching needle is connected. A lift body is pivoted to both the presser foot bar and the feed foot bar. The lift body has an arcuate surface against which a roller connected to the needle bar acts to pivot the lift body alternately about the two connections. This provides appropriate lifting and lowering of the presser foot bar and the lift foot bar during a stitching cycle.