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. 10, 1997
Filed:
Feb. 03, 1995
Arnold S Herer, Ho Pewell Township, NJ (US);
Thomas M Knobel, Morris Plains, NJ (US);
Gregory J Robb, Lawrenceville, NJ (US);
E-Beam Corporation, Cranbury, NJ (US);
Abstract
A method the electron-beam irradiation of gemstones for uniform color enhancement requiring an electron-beam source having a capacity of 500 kW generating energy of between 3 MeV to 50 MeV. The method requires the gemstones to be moved in and out of the electron-beam path with the electron-beam source also being oscillated but in a direction ninety degrees opposed to the gemstones. Cooling means for the gemstones are also required to prevent heat stress cracking. Gemstones such as beryl, diamonds, quartz, sapphires, tourmaline, dark pearls and other minerals are suitable. More particularly the method relates to the treatment of topaz.