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:
Sep. 06, 1977
Filed:
Oct. 30, 1975
Philip J Goetz, Pleasantville, NY (US);
Pen Kem, Inc., Croton-On-Hudson, NY (US);
Abstract
Microelectrophoresis apparatus is provided comprising an electrophoresis chamber, circuit means for impressing a voltage across the chamber, means for generating a light beam to illuminate a portion of the chamber, and a microscope including an objective lens system and an eyepiece for viewing illuminated particles migrating relative to a suspending medium within the chamber under the influence of the applied voltage. Disposed within the microscope between the objective lens system and the eyepiece i.e., internally of the microscope, is a movable optical prism driven by a galvanometer, the drive circuit of which includes an adjustable potentiometer for controlling the rate and direction of movement of the optical prism. Circuit means connected to the galvanometer drive circuit and the circuit applying the voltage potential across the chamber is adapted to develop a signal proportional to the electrophoretic mobility or zeta potential of the migrating particles in the medium in the chamber when the rate of movement of the optical prism is adjusted such that it cancels the transfer velocity of the migrating particles and the particles appear stationary when observed through the eyepiece of the microscope.