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:
Apr. 23, 1991
Filed:
Dec. 23, 1988
Takayoshi Kandachi, Osaka, JP;
Central Glass Company, Limited, Ube, JP;
Abstract
The invention relates to a substantially foamless sintered glass body with a decorative pattern. The glass body is made of a glass and a powder of at least one heat-resistant inorganic oxide, e.g. aluminum oxide, which is colorless or assumes a whitish color and has a refractive index different from that of the glass by at least 15%, and the glass body contains an inorganic pigment. The oxide powder amounts to 0.2-10 wt % of the glass. The glass body has, in its surfaces and sections, opaline or opaque and palely colored mottles bordered by less opaque and relatively deeply colored regions. The glass body is produced by compressively granulating a powder mixture of the glass, inorganic oxide(s) and pigment into granules not smaller than 1 mm, integrating the granules, firing the integrated granules at a temperature ranging from the softening point to the fluid point of the glass and applying a pressure to the fired material during or immediately after firing. The mottle size in the sintered glass body depends on the granule size of the fired material, and opaqueness of the mottles is attributed to the light diffusing effect of the oxide powder.