Patent · US Expired

Boron nitride sealing element

US6299805A · kind A · utility

2Cited by

2References

16Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Karl-Hermann Friese · Leonberg, DE
Helmut Weyl
Anton Hans · Ludwigsburg, DE

Key dates

Filing date	Jul 9, 1999
Grant date	Oct 9, 2001
Priority date	—
Expiry date	Jul 9, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S277/94
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A sealing member is produced from form-pressed boron nitride powder, while adding an inorganic or organic binding agent. Such boron nitride powder is obtained during the machining of boron nitride blocks composed of hexagonal boron nitride. This powder can be fractionated according to particle size and the particle size desired for manufacturing the sealing member can be separated out.

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