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, 2005
Filed:
Mar. 05, 2001
Suresh Shankarappa Vagarali, Columbus, OH (US);
Thomas Richard Anthony, Schenectady, NY (US);
John Casey, Dublin, IE;
Robert Charles Devries, Burnt Hills, NY (US);
Stephen Lee Dole, Columbus, OH (US);
John William Lucek, Powell, OH (US);
Alan Cameron Smith, Dublin, IE;
Biju Varghese, Worthington, OH (US);
Steven William Webb, Worthington, OH (US);
Suresh Shankarappa Vagarali, Columbus, OH (US);
Thomas Richard Anthony, Schenectady, NY (US);
John Casey, Dublin, IE;
Robert Charles DeVries, Burnt Hills, NY (US);
Stephen Lee Dole, Columbus, OH (US);
John William Lucek, Powell, OH (US);
Alan Cameron Smith, Dublin, IE;
Biju Varghese, Worthington, OH (US);
Steven William Webb, Worthington, OH (US);
Diamond Innovations, Inc., Worthington, OH (US);
Abstract
A jadeite material has a thickness in excess of about 1.0 mm and CIELAB indices of L*>42, a*<−6, and b*>+6. The grain size of the jadeite material is less than about 30 microns and is an equiaxed grain structure. The jadeite material has an optical transmission peak between 500 and 565 nm with an I/Ioptical transmission ratio of over 40%. The first step in making the jadeite material is to wrap a glass block, convertible by HP/HT into jadeite and having a nominal composition of NaAlSiO, with a graphite or refractive metal sheet. The wrapped glass block is placed in an HP/HT apparatus, rapidly heated, and subjected therein to a pressure in excess of about 3 GPa and a temperature in excess of about 1000° C. for a time adequate to convert the glass block into jadeite. The jadeite material then is cooled and the pressure subsequently released.