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:
Dec. 29, 1992
Filed:
Aug. 27, 1991
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Abstract
In a method for manufacturing forsterite single crystals containing tetravalent chromium as luminescent ions, the method which comprises the use of chromium dioxide or comprises the use of a sintered body obtained either by sintering in a non-reducing atmosphere chromium trioxide or a mixture of at least 30 wt. % of chromium trioxide with up to 70 wt. % of dichromium trioxide, together with other oxide materials for forsterite, or by firing in an oxidizing atmosphere a mixture of more than 70 wt. % of dichromium trioxide with less than 30 wt. % of chromium trioxide, together with other oxide materials for forsterite. This invention also relates to forsterite single crystals obtained by each of the above methods.