Patent · US Active

Purification of quartz powders by removal of microparticles of refractory materials

US11878937B2 · kind B2 · utility

0Cited by

7References

12Claims

0Family size

Assignees

HERAEUS QUARZGLAS GMBH & CO. KG · DE
Heraeus Conamic UK Limited · GB

Inventors

Ian George Sayce · Springwell, GB
Michael Schindler · Wallsend, GB
Fabian Schildt · Hanau, DE
Eduard Visnow · Hanau, DE

Key dates

Filing date	Jul 10, 2020
Grant date	Jan 23, 2024
Priority date	—
Expiry date	Feb 6, 2042

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03C2201/02
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Described is a process for the refinement of a quartz powder, comprising the step of separating microparticles of refractory minerals, in particular minerals containing rare earth metal compounds, from the quartz powder by an elutriation step.

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