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. 04, 2000
Filed:
Mar. 26, 1998
Applicant:
Inventors:
Tatsuoki Nagaishi, Itami, JP;
Hideo Itozaki, Itami, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ; G01R / ; G01N / ; G01N / ;
U.S. Cl.
CPC ...
324204 ; 324239 ; 23 6142 ;
Abstract
Method and apparatus for determining concentration of a trace of contaminant magnetic substances contained in a non-magnetic substance. A magnetic field (3) is applied to the non-magnetic substance (1) from outside a duct (2) through which the non-magnetic substance is advanced so that magnetic substances contained in the non-magnetic substance are magnetized. At a downstream in the duct, an intensity of magnetic field produced substantially only by the magnetized magnetic substance is detected by a magnetic sensor (8) having a superconducting quantum interference device (SQUID).