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. 03, 2025
Filed:
May. 26, 2021
Applicant:
Disco Corporation, Tokyo, JP;
Inventor:
Ryogo Maji, Tokyo, JP;
Assignee:
DISCO CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09G 1/02 (2006.01); C03B 19/06 (2006.01); C03B 19/09 (2006.01); C03C 11/00 (2006.01);
U.S. Cl.
CPC ...
C09G 1/02 (2013.01); C03B 19/06 (2013.01); C03B 19/09 (2013.01); C03C 11/00 (2013.01); C03C 2204/08 (2013.01);
Abstract
A production process of a polishing stone includes a glass sphere feeding step of feeding glass spheres into a mold, and a firing step of heating the mold with the glass spheres filled therein at a temperature higher than a softening point and lower than a melting point of the glass spheres, thereby forming a glass block as the polishing stone. In the firing step, the heating is stopped with air bubbles still dispersed and remaining in interstices between the glass spheres in a dispersed manner.