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:
Feb. 23, 1982
Filed:
Jun. 18, 1980
Applicant:
Inventors:
Robert C DeVries, Saratoga, NY (US);
Roy E Tuft, Albany, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73104 ; 356 30 ;
Abstract
A smooth surface of a diamond or cubic boron nitride crystal is bombarded with ions sufficiently to penetrate the surface and impart an ion implanted region in the crystal in a predetermined pattern, the resulting crystal is charged electrostatically, and a powder is applied to the charged smooth surface producing a pattern thereon which is a delineation of the implanted region and can be used to identify or fingerprint the crystal.