Patent · US Active

Method of producing an electret material

US8153702B2 · kind B2 · utility

4Cited by

7References

29Claims

0Family size

Assignee

SONY GROUP CORPORATION · JP

Inventors

Nikolaus Knorr · Stuttgart, DE
Silvia Rosselli · Stuttgart, DE
Tzenka Miteva · Stuttgart, DE
Gabriele Nelles · Stuttgart, DE

Key dates

Filing date	Sep 14, 2009
Grant date	Apr 10, 2012
Priority date	—
Expiry date	Apr 30, 2030

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2239/0435
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to a method of producing an electret material, to a new class of electret materials and to a device comprising such electret materials.

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