Abstract: The invention is a water-soluble N,N-diallyl-N-alkyl-N-(sulfoalkyl) ammonium betaine containing copolymer, wherein said copolymer is formed from the polymerization of an N,N-diallyl-N-alkyl-N-(sulfoalkyl) ammonium betaine of the formula:  wherein R is selected from the group consisting of alkyl and aryl groups, and R1 is selected from the group consisting of alkyl groups, aryl groups, and alkylaryl groups,  and an anionic monomer, and  the invention is also a method of inhibiting the precipitation and deposition of scale on metal surfaces in contact with industrial cooling waters comprising the addition of an effective, scale-inhibiting amount of a water-soluble N,N-diallyl-N-alkyl-N-(sulfoalkyl) ammonium betaine containing copolymer, wherein said copolymer is formed from the polymerization of a betaine of the formula:  wherein R is selected from the group consisting of alkyl and aryl groups, and R1 is selected from the group consisting of alkyl groups

Abstract: The present invention provides a novel formulation in a composition comprising FeCl3 and a dialkyl diallyl ammonium polymer where the FeCl3 has been diluted with water prior to being mixed with the polymer providing a stable composition.

Abstract: An oil based drilling mud is viscosified with a maleated ethylene-propylene elastomers. The elastomers are preferably EPM copolymers or EPDM terpolymers. The concentration of the maleic anhydride grafted to the copolymer or terpolymer backbone ranges from 0.01 to 5 wt %, preferably 0.1 to 2.0 wt %. The maleated elastomers are far more effective oil mud viscosifiers than the organophilic clays presently used.

Abstract: A method for reducing formation of deposits on a surface in contact with an aqueous system includes applying to the surface a composition comprising a polyoxypropylene-polyoxyethylene block copolymer and a biocide. The composition optionally may also include a dispersant.

Abstract: A coated implantable medical device 10 includes a structure 12 adapted for introduction into the vascular system, esophagus, trachea, colon, biliary tract, or urinary tract; at least one layer 18 of a bioactive material positioned over the structure 12; and at least one porous layer 20 positioned over the bioactive material layer 18. Preferably, the structure 12 is a coronary stent, and the bioactive material is at least one of heparin, dexamethasone or a dexamethasone derivative. The device 10 includes layers 18 and 22 of heparin and dexamethasone, the layer 22 of dexamethasone being positioned above the layer 18 of heparin. The layers of bioactive material also can be individual materials or a combination of different materials. Unexpectedly, the more soluble heparin markedly promotes the release of the less soluble dexamethasone above it. The porous layer 20 is composed of a polymer applied by vapor or plasma deposition and provides a controlled release of the bioactive material.

Abstract: Reactive multifunctional imide monomers have been discovered from which radiation curable oligomers and polymers may be derived. The reactive imide monomers have at least one functional group which is polymerizable under free radical or ionic polymerization conditions with other similar functional groups. However, the same functional group and reaction product derived therefrom is substantially not subject to cleavage by oxidation or hydrolysis. The reactive imide monomer also contains at least one other functional group which remains intact under the above-described polymerization conditions to form a part of a side chain of the resultant polymer and will cross-link or cure by 2+2 cyclo-addition with other like functional groups upon irradiation.

Abstract: The present invention is directed to a reactive diluent comprising a backbone portion and a pendant group portion. The backbone portion comprises at least two polymerizable sites, and the pendant group portion comprising a functional group having the following formula: ##STR1## wherein Z is an ethylenically unsaturated hydrocarbyl or substituted hydrocarbyl group containing from 2 to about 12 carbon atoms and wherein said pendant group is capable of a (2+2) cyclo-addition with another like pendant group of the above formula. The chain extending reaction site is preferably used in a polymerization reaction to provide a polymeric material, and the cross-linking reactive site is preferably used to create cross-linking as needed or desired.

Abstract: The present invention is directed to a reactive diluent comprising a backbone portion and a pendant group portion. The backbone portion comprises at least two polymerizable sites, and the pendant group portion comprising a functional group having the following formula: ##STR1## wherein Z is an ethylenically unsaturated hydrocarbyl or substituted hydrocarbyl group containing from 2 to about 12 carbon atoms and wherein said pendant group is capable of a (2+2) cyclo-addition with another like pendant group of the above formula. The chain extending reaction site is preferably used in a polymerization reaction to provide a polymeric material, and the cross-linking reactive site is preferably used to create cross-linking as needed or desired.

Abstract: There is provided a glass enamel system adaptable to be fired from about 1000.degree. F. to about 1350.degree. F., said glass enamel characterized, upon firing, by a formation therein of metal orthosilicate crystals, which has the effect of substantially hardening the surface of said glass enamel even at its fusion point temperature, and within the range aforesaid.

Abstract: A method for the solubilization and recovery of insoluble parasite protective antigenic factors associated with parasite material comprising solubilizing the antigenic factors with a non-ionic detergent and separating the solubilized material from undispersed residual material. The purified protective antigenic factors are useful as vaccines, particularly against malaria, and as diagnostic agents.

Abstract: The present invention relates to an improved U.V. absorbing glass composition comprising from about 75 to about 98 parts by weight of a lead oxide free base glass having dissolved therein from about 2 to about 25 parts by weight of a U.V. additive selected from the group consisting of cerium oxide, manganese oxide, iron oxide, cobalt oxide, copper oxide, vanadium oxide, molybdenum oxide, and mixtures of two or more of said oxides; and to an ink composition comprising from about 15 to about 25% by weight vehicle, from about 8 to about 16% by weight a ceramic pigment, and from about 59 to about 77% by weight of said U.V. absorbing glass composition.

Abstract: A surgical device for insertion into a living being to support the larynx comprised of an elongated tubular member having a closed, crowed upper end. The device is comprised of a resilient biocompatible polymer material and includes an elongated, narrow aperture through the crowned upper end forming a normally closed valve-like arrangement.

Abstract: A continuous and valveless sorber device is described which utilizes a novel rotating sorption bed which operates through at least three zones (sorption, desorption and cooling). The rotating sorption bed is contained within a plurality of manifolds and the sorption bed and the manifolds are sealed to one another via sealing means. Contaminated fluid is directed through the sorption zone of the rotating sorption bed where the contaminants are removed by sorbents. The bulk of the fluid which is then cleaned is available for use. A portion of the clean fluid (regeneration fluid) is used to cool the sorbent in the cooling zone of the rotating sorption bed. The warmed regeneration fluid is then heated by a regeneration heater and is subsequently directed into the desorption zone of the rotating sorption bed where the hot clean regeneration fluid is used to desorb and carry away the contaminants from the sorbent.

Abstract: A capacitance measuring device and method including a ratio transformer, a reference capacitor(s), and multiplying digital to analog converters connected to form a bridge, the converter being adjustable to at least partially balance the bridge. The bridge can further include a 90.degree. phase shifter and reference capacitors to balance the real part of the unknown impedance. An internal calibration scheme calibrates various components of the bridge.

Abstract: The invention relates to a ski brake that is integrated into the housing of a safety ski binding. The ski brake has a pair of bushings aligned along a horizontal axis through the housing of the ski binding. The bushings rotate in the housing of the binding and have non-circular axially aligned openings that move the arms of the ski brake outwardly, around the ski, as the arms are deployed. The short lever arm sections of the L-shaped ski brake arms are spring biased into contact with the bushing surfaces and are moved according to the non-circular surfaces in the bushing.

Abstract: Disclosed is a device for generating an analog output signal indicative of an impact to a transducer. The transducer may be mounted on protective equipment utilized in various martial arts fields, such as protective vests and the like or can be mounted on training equipment, such as a heavy bag, striking pad, etc. In a preferred embodiment the transducer is a piezoelectrical signal which is indicative of the amount of deformation. By placing the piezoelectric film on top of a deformable material, in a preferred embodiment sandwiching it in the deformable material, impacts to the deformable material will strain the piezoelectric film generating the signal output. In a further embodiment of the present invention, the piezoelectric transducer is mounted on a target pad and provides an analog output indicative of the characteristics of an object impacting the target pad.

Abstract: An axial flow turbine having one or more turbine wheels functioning both as the compressor and the turbine sections. Fluid flow is redirected over the compressor section to effect multiple stages of compression.

Abstract: A method of interconnecting a panel edge to a structural member with an adhesive which will only bond to the panel material comprises positioning the panel edge in a groove of the structural member which is filled with the adhesive. The groove has converging opposing surfaces towards the groove entrance which defines an enlarged cavity beneath the groove entrance. The adhesive, when it hardens, is securely bonded to the panel and forms an interlock between the panel and the converging surfaces of the groove to interconnected securely the panel to the structural member.