Abstract: This invention relates to thiadiazinone derivatives which have inotropic and vasodilator activity. A specific compound of this invention is 7-acetamido-9,9a-dihydroindeno[1,2-e][1,3,4]thiadiazine-2(3H)-one.

Abstract: A process for preparing 6-(2-hydroxyphenyl)-3-pyridazinone which comprises reacting 2-hydroxyacetophenone with glyoxylic acid under alkaline conditions, adjusting the pH of the reaction mixture to give a mixture within a pH range of about pH 4.0-9.5 and which contains a weak base, and subsequently reacting with hydrazine.6-(2-Hydroxyphenyl)-3-pyridazinone is a useful intermediate in the preparation of anti-hypertensive agents.

Abstract: This invention relates to 5-(phenyl)-2(1H)-pyrazinones substituted in the 4-position of the phenyl ring by a nitro group, and to a process for their preparation. These compounds are useful intermediates in the synthesis of inotropic compounds. One specific compound is 5-(4-nitrophenyl)-2(1H)-pyrazinone.

Abstract: The base section of an upstanding, telescoping mast is fixedly anchored in respect to the ground and the top section is vertically adjustable in respect to the base section. A plurality of horizontally disposed swing arms are pivotally supported in spaced vertical alignment along the height of the top section. The radially extending free end of each swing arm is slidably engageable into one end of the message tube of a message holder, in which tube is received a piece of paper on which a message is written. The ends of an arcuate tube are fixedly attached to the opposite end of the message tube to form a closed ring of sufficient diameter to enable an operator, who is passing by on a traveling vehicle, to extend his arm to the ring and pull the message holder free from the swing arm. Spring clips are attached to the free end of a swing arm for both limiting the endwise engagement between the swing arm and the message tube and for resisting rotational movement of the message tube in respect to the swing arm.

Abstract: A method and apparatus for modulating the perceptible intensity of the presentation of a light emitting display which light emitting display emits light by gas discharge and recombination of ions and free electrons of a display medium; includes a system clock, the interruption of which causes the interruption of the presentation of the light emitting display; and is capable of retaining display information upon the interruption of a light sustaining signal or the electrical power as a result of an accumulation and retention of electrical charge across the display medium.