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:
Mar. 30, 1993
Filed:
Mar. 23, 1992
William A Hanson, Westlake Village, CA (US);
Steven W Shaw, Thousand Oaks, CA (US);
Hanson Research Corp., Chatsworth, CA (US);
Abstract
A diffusion cell to facilitate the automated removal of test aliquots of liquid from a receptor chamber of the diffusion cell so as to determine percutanous absorption through a membrane of a donor fluid from a donor chamber into the receptor chamber of the diffusion cell. There is utilized a sampling port through which the test aliquot is to be removed, the removal being achieved by means of a sample tube which is to be movable into and out of the receptor chamber. Within the receptor chamber is located a stirring device in the form of a helical coil which is to be rotated to achieve stirring and homogeneous mixing of the liquid within the receptor chamber. A refilling tube connects also with the receptor chamber to add liquid into the receptor chamber as the test aliquot has been removed. A leveling tube within the sampling port is to restore the initial preset receptor liquid volume between sampling intervals.