Patent · US Expired

Apparatus for the surface cleaning of quartz-crystal pieces

US4445523A · kind A · utility

8Cited by

4References

4Claims

0Family size

Assignee

Heraeus Quarzschmelze GmbH · DE

Inventors

Rolf Bruning · Bruchköbel, DE
Klaus Reimann · Eindhoven, NL

Key dates

Filing date	Apr 29, 1983
Grant date	May 1, 1984
Priority date	—
Expiry date	Apr 29, 2003

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03C1/022
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Apparatus for cleaning the surface of small quartz-crystal pieces with aqueous hydrofluoric acid is disclosed wherein the quartz pieces are introduced into a vessel containing a conveying means and conveyed e.g. horizontally in counter-current to aqueous hydrofluoric acid introduced at the opposed end of the vessel. During the washing the quartz pieces are tumbled.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.