Abstract: A method of making abrasive particles having a specified shape and abrasive articles containing abrasive particles having a specified shape.

Abstract: Invention relates to new carbodiimide compound obtainable from reaction mixture comprising an isocyanate compound and a monofunctional alcohol in a non-reactive solvent in the presence of a suitable catalyst, characterized in that the isocyanate compound and the monofunctional alcohol, except for the hydroxy group, are free from isocyanate reactive hydrogen atoms and the monofunctional alcohol is a branched aliphatic alcohol containing at least 8 carbon atoms, and to compositions comprising a fluorochemical oil and water repellent agent and said carbodiimide compound.

Abstract: A flexible, durable, cube-cornered retroreflective article capable of accommodating the expansion and contraction of the underlying polymeric substrate where such article has a pillowed or curved microstructured member bonded in a regular pattern to a sealing member. The retroreflective article has normal and stressed states. In the normal state, the microstructured member is substantially parallel with the sealing member. In the stressed state, the microstructured member is either compressed or elongated and the sealing member is substantially flat. The retroreflective article may be attached to traffic control devices, such as polymeric barrels, cones, or tubes to direct and guide motorists through road construction areas.

Abstract: A semiconductor heterojunction, guided-wave, electroabsorption modulator. The device includes a rib waveguide fabricated on a substrate. The waveguide includes a relatively thin and off-center undoped electroabsorbing layer within a light-guiding region. Electrodes configured for interconnection to an external voltage source produce an electric field within the waveguide. Heavily doped field confining layers on opposite sides of the electroabsorbing layer confine the electric field within the electroabsorbing layer to cause the electroabsorption of radiation in accordance with the Franz-Keldysh effect.

Abstract: The present invention relates to an abrasive article comprising an aligned row of connected abrasive sheet members each having a main portion, an aperture formed in the main portion, and a plurality of arm portions perimetrically spaced about the main portion at a constant angle with respect to each adjacent arm portion. The sheet members are formed to enable the aligned row to be Z-folded such that the apertures of each respective sheet member are substantially in register, and the arm portions of each abrasive sheet member are angularly offset with respect to the arm portions of each immediately adjacent abrasive sheet portion by one-half of the angle between each of the arm portions.

Abstract: A housing adapted for receiving a sonic transducer capable of projecting and receiving a sonic pattern having a primary lobe and a secondary lobe. The housing has an end wall for receiving the sonic transducer and a restrictive wall for intercepting the secondary lobe of the sonic pattern in one quadrant and reflecting that portion of the secondary lobe into the opposite quadrant. A pair of side walls substantially intercept and reflect the secondary lobe in quadrants adjacent the one quardant to provide more uniform sonic pattern. The side walls may be disposed at an angle outward from the direction of projection of the primary lobe having a value of from 0.2 to 0.3 of the value of the angle the secondary lobe makes with the primary lobe.

Abstract: A microporous article is provided. The article comprises a thermoplastic polymeric structure having a plurality of cells with adjacent cells being interconnected by passageways to provide a network of communicating pores. The structure is oriented in at least one direction.

Abstract: An ultrasonic Doppler flow measurement system for measuring blood flow in a polymer conduit includes an ultrasonic transmitter transducer, an ultrasonic receiver transducer, an amplifier/detector circuit for producing a Doppler signal which varies in frequency as a function of blood velocity, a clipping circuit, an automatic gain control circuit, and a frequency-to-voltage converter which produces an output signal having a voltage which is a function of flow velocity. The automatic gain control circuit accomodates variations in Doppler signal strength due to varying red blood cell concentration. The clipping circuit prevents an inordinate reduction of gain by the automatic gain control circuit due to extremely large, occasional gas bubbles or fat globules in the blood.

Abstract: A tape dispenser for pressure sensitive adhesive coated tape having a stretchable backing. The dispenser includes a housing comprising a base portion having a cavity in which a roll of the tape is mounted, and a slotted land area spaced from the hub against which tape from said roll may be releasably adhered; and a cover portion on the base portion for movement from an open position with teeth on the cover spaced from the slot toward a closed position so that the teeth enter the slot and cut tape on the land area. The cover includes walls defining a socket adapted to receive a portion of a user's thumb so that the user may grasp the dispenser in one hand with his fingers around the base portion and his thumb in the socket and with one hand alone move the cover and base portions between their open and closed positions leaving his other hand free to pull tape from the dispenser.

Abstract: A dentifrice composition containing a water-dispersible, membrane-forming material which, when applied to tooth surfaces in an oral environment, attaches thereto and forms a substantially continuous, hydrophobic barrier thereon which substantially reduces, elution of a previously applied therapeutic agent.

Abstract: Granular sorbent material comprising a granular high surface area support impregnated with a water soluble, essentially non-volatile primary or secondary amine with equivalent weight less than about 400 and bearing either zero or two carbonyl substituents attached directly to the amino nitrogen atom is disclosed. The resulting material can be used as the filtration media in respirators, powered air purifiers, room air purifiers, ventilation filters, exhaust filters, process gas filters and the like to reduce the formaldehyde content of air.