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:
Nov. 03, 2026
Filed:
Jun. 19, 2025
Applicant:
Sumco Corporation, Tokyo, JP;
Inventors:
Assignee:
SUMCO CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B 15/10 (2006.01); C03B 20/00 (2006.01);
U.S. Cl.
CPC ...
C30B 15/10 (2013.01); C03B 20/00 (2013.01);
Abstract
A manufacturing method of a quartz glass crucible includes: producing a quartz glass crucible by arc-melting raw material quartz powder deposited on an inner surface of a rotating mold; washing an inner surface of the quartz glass crucible with pure water thereby reducing a total concentration of Na, K, and Ca contained in a silica glass around the inner surface as compared to that before washing; and etching the inner surface with washing liquid containing hydrofluoric acid.
Quick Actions:
Ohara, Masami. (2026). Manufacturing method of quartz glass crucible (U.S. Patent No. 12781380). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12781380
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile