Abstract: A heart valve delivery apparatus includes a valve carrying member. A prosthetic valve is crimped onto the valve carrying member at a location that is distal or proximal to the balloon member, thereby providing a smaller profile delivery apparatus.

Abstract: A heart valve delivery apparatus includes a valve carrying member. A prosthetic valve is crimped onto the valve carrying member at a location that is distal or proximal to the balloon member, thereby providing a smaller profile delivery apparatus.

Abstract: A novel emulsion polymerization process for the production of fluoroelastomers is disclosed wherein a partially fluorinated anionic surfactant of the formula F—(CF2CF2)n—CH2CH2SO3M, where n is an integer from 2 to 9, or mixtures thereof, and M is a cation having a valence of 1, is used as the dispersing agent.

Abstract: The invention concerns a process for melt forming conductive compositions comprising ionomers into multi-layer electrochemical cells suitable for use in electrochemical applications such as batteries, fuel cells, electrolysis cells, ion exchange membranes, sensors, electrochemical capacitors, and modified electrodes.

Abstract: An improved process for the continuous copolymerization of ethylene with certain polar comohomers having reactive double bonds is disclosed wherein reactor fouling is significantly reduced or eliminated by use of surfactants.

Abstract: 1,4-Bis(4-phenoxybenzoyl)benzene is made in a heterogeneous system by a reaction of diphenyl ether with 1,4-benzenedicarbonyl chloride at 190.degree.-250.degree. C. in the presence of a zeolite catalyst having a ring structure containing 12 oxygen atoms, which can be either an activated zeolite in hydrogen form or an iron-exchanged zeolite, which zeolite can be readily separated from the hot liquid phase in the reaction mixture. The mole ratio of diphenyl ether to 1,4-dicarbonyl chloride, when the catalyst is in hydrogen form, is about 50-80:1; when the catalyst is in iron-exhcanged form, it is about 10-50:1, and the weight ratio of 1,4-benzenedicarbonyl chloride to zeolite in hydrogen form is 3:1 to 1:2, while the ratio of 1,4-benzenedicarbonyl chloride to zeolite in iron-exchanged form is 10:1 to 1:32. The product readily crystallizes in a high state of purity from the cooled solution. 1,4-Bis(4-phenoxybenzoyl)benzene is a vaulable intermediate in the synthesis of polyetherketone resins.

Abstract: A process for manufacturing 1,4-bis(4-phenoxybenzoyl)benzene, wehrein diphenyl ether is contacted for about 30-360 minutes at 130.degree.-200.degree. C. with 1,4-benzenedicarbonyl chloride in respective mole ratios of about 15-80:1 in the presence of a fluorocarbon resin carrying pendant sulfonic acid groups, the weight ratio of the resin to 1,4-benzenedicarbonyl chloride being 3:1-1:2; the hot solution is separated from the resin, and the crystalline product is recovered from the solution on cooling. The so obtained 1,4-bis(4-phenoxybenzoyl)-benzene is a high purity material free of ortho-isomer and catalyst contamination and can be used without further purification as one of the starting materials in the preparation of polyetherketones, which are important engineering resins.

Abstract: A stackable drum as disclosed. At one edge of the top, a water collecting channel is defined having outlet holes communicating with it. The walls of the drum are reinforced. A skirting on the bottom of the drum is received within the lip of the drum beneath. The top, bottom and side walls are adapted to cooperate, when a plurality of such drums are stacked vertically, to pass the weight of an upper drum directly through the rim of the top, through the walls and bottom, and into a third drum stacked below it. A cap seal is applied atop the lid of the drum. It is in the form of a closed pan, with a stopper in it.

Abstract: An expandable composition of a solid synthetic vulcanizable elastomer of ethylene/higher alpha-olefin/nonconjugated diene copolymer or polychloroprene, a blowing agent, and a curing agent for the elastomer, said composition containing from about 5-25% based on the weight of total polymer of an ionomer resin which is an ethylene polymer containing at least about 50 mole percent ethylene and bearing from about 0.2-25 mole percent acid functional groups that are at least about 50% neutralized by metal ions.