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. 14, 2020
Filed:
Dec. 16, 2016
Heraeus Quarzglas Gmbh & Co. KG, Hanau, DE;
Martin Arndt, Johannesberg, DE;
Matthias Otter, Hamm, DE;
Walter Lehmann, Leipzig, DE;
Michael Hünermann, Alzenau, DE;
Nils Christian Nielsen, Göllheim, DE;
Nigel Robert Whippey, Seligenstadt, DE;
Boris Gromann, Aschaffenburg, DE;
Abdoul-Gafar Kpebane, Hanau-Mittelbuchen, DE;
Heraeus Quarzglas GmbH & Co. KG, Hanau, DE;
Abstract
The invention relates to a process for the preparation of a quartz glass grain comprising the process steps i.) Providing a silicon dioxide granulate from a pyrogenically produced silicon dioxide powder, ii.) Making a glass melt out of silicon dioxide granulate, iii.) Making a quartz glass body out of at least part of the glass melt and iv.) Reducing the size of the quartz glass body to obtain the quartz glass grain. The invention further relates to a quartz glass grain which is obtainable by this process. The invention further relates to opaque quartz glass bodies, which are obtainable by further processing of the quartz glass grain.