An embolic protection device has a collapsible filter element (105) mounted on a carrier such as a guidewire (101). The filter element (105) collapses into the outer end of a catheter (118) for deployment and retrieval through a vascular system of a patient. The filter element (105) has a collapsible filter body with a proximal inlet end and a distal outlet end. The proximal inlet end has inlet openings sized to allow blood and embolic material enter the filter body. The outlet end has outlet openings which allow through passage of blood but retain embolic material within the filter body. After use, the catheter (118) is movable along the guidewire (101) to engage the proximal end of the filter element and close the inlet openings before sliding over the filter element from the proximal end to the distal end to progressively collapse the filter body on the guidewire (101) for retrieval. The filter element (105) may conveniently be mounted on a tubular sleeve (104) which is slidable and rotatable on the guidewire (101) between spaced-apart stops (106, 120) on the guidewire (101) which allows some manipulation of the guidewire independently of the filter when the filter is in use.

An embolic protection device

This invention relates to methods of using cationic ionomers in golf ball cover compositions. Further, this invention relates to golf balls which have covers and cores and which incorporate urethane ionomers. The polyurethane golf ball cover has improved resiliency and initial velocity through the addition of an alkylating agent such as t-butyl chloride to introduce ionic interactions in the polyurethane and thereby produce cationic type ionomers.

Golf ball covers

Graphite nanoplatelets of expanded graphite and composites and products produced therefrom are described. The preferred method of expanding the graphite is by microwaves or other radiofrequency wave treatment of intercalated graphite. The expanded graphite is preferably then crushed to nanometer (substantially all 200 microns or less). The expanded graphite is used in polymer composites. The expanded graphite is particularly useful for batteries, anodes and fuel cells.

Expanded graphite and products produced therefrom

A remote plasma generator, coupling microwave frequency energy to a gas and delivering radicals to a downstream process chamber, includes several features which, in conjunction, enable highly efficient radical generation. In the illustrated embodiments, more efficient delivery of oxygen and fluorine radicals translates to more rapid photoresist etch or ash rates. A single-crystal, one-piece sapphire applicator and transport tube minimizes recombination of radicals in route to the process chamber and includes a bend to avoid direct line of sight from the glow discharge to the downstream process chamber. Microwave transparent cooling fluid within a cooling jacket around the applicator enables high power, high temperature plasma production. Additionally, dynamic impedance matching via a sliding short at the terminus of the microwave cavity reduces power loss through reflected energy. At the same time, a low profile microwave trap produces a more dense plasma to increase radical production. In one embodiment, fluorine and oxygen radicals are separately generated and mixed just upstream of the process chamber, enabling individually optimized radical generation of the two species.

Remote plasma generator with sliding short tuner

Burning rate catalysts are one of the most important components of rocket propellants and are able to enhance solid propellant burning rates. There are several kinds of burning rate catalysts such as nanometal burning rate catalysts, nanometal oxide burning rate catalysts, compound burning rate catalysts, ferrocene and its derivatives burning rate catalysts, and so on. This article reviews the recent research processes in burning rate catalysts.

Recent Research Progress in Burning Rate Catalysts

A fire protective blanket is fabricated by sealing and forming between twoheets of plastic material a pocket or quilt design of fire extinguishing chemical in powder form which is contained in the formed pockets and selected from potassium hydrogen carbonate, sodium hydrogen carbonate, and the reaction product of potassium hydrogen carbonate and urea. A thickness from about 2 millimeters to about 5 millimeters has been found adequate for the plastic sheet material selected from poly-p-ethylene terephthalamide (Kevlar) or polyethylene. The sealed pocket or patch quilt design is to ensure against the powder from becoming nonuniformly distributed throughout the blanket and to ensure that no settling of the chemical takes place as well. The action mechanism, which can extinguish gasoline fires in millisecond time frames, is due to the rupture of the pockets containing the fire extinguishing chemicals when the gasoline is ignited. The fire extinguishing powder becomes dispersed throughout the immediate environment, and interacts with the fireball, and quenches it. The fire protective blanket is useful in quickly extinguishing automobile engine fires, lawnmower fires, and other fires resulting from burning materials including other liquids, solid, or combinations thereof. When used under an automobile hood in combination with the sound and heat barrier, the fire protective blanket should be installed as the outer layer toward the motor. The plastic material should be fabricated from a higher temperature withstanding material such as FTE (polytertrafluoroethylene) or a copolymer of tetrafluoroethylene and hexafluoropropylene (FEP) or more broadly identified as fluorinated ethylenepropylene resin.

Fire protective blanket

A signal flare with luminous oscillations resulting from a combustible cosition of octafluorohexanediol, magnesium or aluminum, chlorinated benzene, an inorganic oxidizer, and polyisocyanate.

Signal or rescue flare of variable luminosity

Barium salicylate and/or other organobarium salts, barium oxide, and organometallic salts of lanthanum, hafnium, and tantalum and oxides of the same are used as ballistic modifying means for solid propellants. The specific ballistic modifying means can be used as replacements for the lead, copper, etc., compounds currently employed as ballistic modifiers in solid propellants. The propellants containing the specified ballistic modifying means retain the highly desirable plateau-burning characteristics, pressure exponents, and temperature coefficients but are particularly attractive because they produce considerably less smoke during the burning thereof.

Propellant composition of the nitrocellulose type containing non lead-containing ballistic modifiers

Disclosed is a method of providing an ingition system for substantially sltaneously and uniformily igniting all the internal burning surfaces of a large propellant grain of the internal burning grain type that is employed in an upper stage advanced missile interceptor. The propellant grain to be ignited is also of the type which requires support for reinforcing the grain during high acceleration loads especially before the interceptor stage motor is pressurized. The means for igniting the large propellant grain is comprised of high-velocity deflagration compositions which are derived from cesium dodecahydrodecaborane and which are extruded or formed in a variety of shapes. These shaped high-velocity deflagration compositions are then bonded to a consumable casting mandrel, or to a grain support tube which also serves as a casting mandrel. The casting mandrel is inserted into the rocket motor case; the propellant formulation is then cast into the rocket motor; and the cast formulation is cured to form a grain for an upper stage rocket motor for an advanced interceptor. The shaped cesium dodecahydrodecaborane can be ignited through a perforation in the grain suppot tube or when used with a consumable mandrel, the shaped cesium dodecahydrodecaborane can be provided with a cavity into which an initiator can be inserted and bonded in place with an adhesive. The initiator when ignited serves to ignite the high-velocity deflagration composition which subseqently ignites the advanced interceptor grain with which the shaped cesium dodecahydrodecaborane is in intimate contact.

Ultrafast, linearly-deflagration ignition system

Solid propellant is first placed in a closed container with a solution of ter and detergent. A water slurry is then created by injecting compressed air in superheated steam into the solution to place the propellant and solution under several atmospheres of pressure and at the same time to raise the temperature of the solution to 400°-600° F. This results in oxidation of the propellant into such constituents as carbon dioxide, water, nitrous oxide and etc. These constituents are then removed by absorption.

David C. Sayles

Papers

Fire protective blanket

Signal or rescue flare of variable luminosity

Propellant composition of the nitrocellulose type containing non lead-containing ballistic modifiers

Ultrafast, linearly-deflagration ignition system

Disposal of solid propellants