The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 15, 1989
Filed:
Jun. 23, 1986
Gunvant N Mehta, Bensalem, PA (US);
Dennis J Wertan, Philadelphia, PA (US);
Wayne M Grim, Doylestown, PA (US);
Rorer Pharmaceutical Corporation, Fort Washington, PA (US);
Abstract
Standardized tests of the dissolution rates of pharmacologic dosage units such as salicylic acid tablets, for example, are conducted by placing the dosage unit in a liquid-permeable cylindrical wire basket and rotating the basket in the solvent about two different axes, preferably one vertical axis and one horizontal axis. The apparatus comprises an outer vertical tube to which the basket is mounted off center from the vertical axis of the tube so that it orbits around the vertical axis when the vertical outer tube is rotated; the basket is mounted on a horizontal shaft which can rotate about its horizontal axis. An inner shaft extends vertically through the outer vertical shaft, and bevel gears are provided between the horizontal shaft and the inner vertical shaft so that relative rotation of the upper ends of the inner and outer vertical shafts with respect to each other about their axes causes the basket to rotate about the horizontal shaft axis. By holding the inner shaft stationary and rotating the outer shaft, the desired two-axis motion of the basket is produced.