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:
Jan. 31, 2012
Filed:
Dec. 20, 2007
Manfred Borens, Mainz, DE;
Franz-peter Eckes, Bubenheim, DE;
Janus Zborowski, Ingelheim, DE;
Karsten V. Westernhagen, Mainz, DE;
Stefano Merolla, Mainz, DE;
Joerg Witte, Pfungstadt, DE;
Joachim Kuester, Erzhausen, DE;
Marcus Holla, Biebelnheim, DE;
Manfred Borens, Mainz, DE;
Franz-Peter Eckes, Bubenheim, DE;
Janus Zborowski, Ingelheim, DE;
Karsten V. Westernhagen, Mainz, DE;
Stefano Merolla, Mainz, DE;
Joerg Witte, Pfungstadt, DE;
Joachim Kuester, Erzhausen, DE;
Marcus Holla, Biebelnheim, DE;
Schott AG, Mainz, DE;
Abstract
The method provides an improved quartz glass body, especially an improved quartz glass crucible for melting non-metals, non-ferrous metals, or silicon. The quartz glass body is made by a method in which a quartz glass-water mixture is supplied to a gypsum casting mold comprising an outer part and an inner part, dried in the gypsum mold, and put under an overpressure via a system of ducts in the form of textile tubes embedded in the mold during the drying. Later a resulting green glass body is removed from the mold. At least a portion of the shaping surfaces of the inner part of the gypsum mold are surfaces of a water-impermeable substance. The method provides a cast body with a reduced tendency to crack and with a smaller open porosity.