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:
Dec. 10, 2002
Filed:
Apr. 25, 2001
Francois Bauer, Saint-Louis, FR;
Institute Franco-Allemand de Recherches de Saint-Louis, Saint-Louis, FR;
Abstract
Process for polarizing at least a part of a ferroelectric material in a cylindrical shape having a longitudinal axis, and having an internal conductor inside the cylinder disposed along the longitudinal axis. At least part of said cylinder is placed in a conductive liquid with the cylinder being free from any stresses other than pressure exerted by the conductive liquid. A low frequency AC voltage is then applied between an electrode in contact with the conductive liquid and the internal conductor, and the amplitude of the voltage is increased progressively up to a value such that an electrical field is created having an amplitude greater than a coercive field of polarization Ec of the ferroelectric material.