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:
Aug. 09, 2011
Filed:
Jun. 23, 2004
Masahiro Yoshida, Saitama, JP;
Yoshikane Shinkuma, Tokyo, JP;
Xuelu Zou, Tokyo, JP;
Hoya Corporation, Tokyo, JP;
Abstract
Disclosed are a process for producing a glass shaped material having high quality and high mass accuracy and a process for producing an optical element, which includes the preparation of a glass shaped material having high quality and high mass accuracy, the heating of said glass shaped material and the precision-press-molding thereof. The present invention provides a process for producing a glass shaped material including the separation of a predetermined amount of a molten glass gob from the forward end of a molten glass flow flowing down from a flow pipe, by a specific means and the shaping thereof into the glass shaped material, a process for producing a glass shaped material including the dropping of a molten glass drop from a flow pipe, the receipt thereof with a shaping mold that ejects a gas, by a specific means, and the shaping thereof into the glass shaped material while it is caused to float, and a process for producing an optical element including the precision press-molding of a preform obtained by one of these processes.