Patent · US Expired

Microwave door with viewing window

US6822208B2 · kind B2 · utility

18Cited by

6References

16Claims

0Family size

Assignee

Schott Glas · DE

Inventors

Inka Henze · Udenheim, DE
Stefan Bauer · Alzey, DE
Oliver Gros · Rheinböllen, DE
Bernd Schultheis · Bad Kreuznach, DE

Key dates

Filing date	Feb 19, 2004
Grant date	Nov 23, 2004
Priority date	—
Expiry date	Feb 19, 2024

Classification

Technology area (CPC H)Electricity
CPC primaryH05B6/6414
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The microwave unit door includes a metallic door frame (1) with an interior glass pane (3) and outer glass pane (2) held spaced apart in it. To improve the observability of the interior of the microwave unit without loosing the microwave shielding effect, e.g. previously provided by a metal screen between the glass panes, and to prevent condensate formation, the interior glass pane (3) closest to the processing space (I) has at least one optically transparent electrically conductive first layer (13) with a microwave absorption capability such that it heats up to prevent condensate formation during operation. The outer glass pane (2) has at least one optically transparent electrically conductive second layer (12) reflecting microwaves passing through the first layer.

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