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:
May. 09, 2000
Filed:
Oct. 03, 1997
Applicant:
Inventors:
Yoshitaka Takezawa, Hitachinaka, JP;
Yoshikiyo Kashiwamura, Hitachi, JP;
Ikushi Kano, Tokai-mura, JP;
Assignee:
Hitachi, Ltd, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
356407 ; 356 70 ; 356382 ; 356434 ;
Abstract
To nondestructively diagnose a weight reduction ratio of an insulating material or a lubricating oil without stopping operation of the equipment, a nondestructive diagnostic method uses an optical fiber probe type sensor in which a light transmission loss or a reflective absorbance difference is used as a parameter.