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:
Mar. 13, 1984
Filed:
Sep. 11, 1981
Shiro Kurosaki, Osaka, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
The present invention relates to a process for the production of an optical glass article, which comprises immersing a gelled body containing a compound capable of being converted into a dopant for increasing the refractive index of the glass, in a leaching liquor selected from the group consisting of water, aqueous solutions of weak acids, aqueous solutions of alkali metal salts, ketones and alcohols, leaching at least a part of the compound as ions out of the gelled body, optionally immersing the gelled body in an organic solvent, drying the body in a predetermined atmosphere, decomposing the compound, heating and firing the body at a high temperature and then heating and sintering it at a higher temperature.