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:
Jun. 21, 1988
Filed:
Oct. 24, 1985
Applicant:
Inventor:
Robert Wang, Wissous, FR;
Assignee:
Stein Heurtey, Ris Orangis, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ; G01B / ; G01R / ;
U.S. Cl.
CPC ...
324230 ; 324207 ; 324227 ; 324233 ;
Abstract
A method and apparatus for measuring the thickness of thin metallic layers deposited on a conductive support, wherein the thickness is determined from the measurement of the losses corresponding to the Joule effect, due to the eddy currents which appear when a magnetic circuit excited by an alternating voltage is brought close to the metallic surface.