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:
Jul. 11, 1978
Filed:
Sep. 19, 1975
Jan A Vanden Broek, Ann Arbor, MI (US);
James A Carney, Ann Arbor, MI (US);
Transidyne General Corporation, Ann Arbor, MI (US);
Abstract
A viewer for observing and measuring the diameter of diffusion rings occurring on immuno-diffusion plates employs a magnifying lens for observing the plate and a baffled back lighting system for illuminating the plate so that light diffused by the plate is visible through the lens against a dark field. A beam splitter supported between the lens and the plate superimposes an image of a pair of illuminated filaments on the image of the plate seen through the lens. Manual mechanism allows the spacing of the filaments to be adjusted by the observer to bring them to the diameter of a diffusion ring. A digital display connected to the adjustment system provides a read-out of the filament spacing and thus the diameter of the immuno-diffusion ring.