Patent · US Expired

Color picture tube having internal conductive coatings

US4827185A · kind A · utility

1Cited by

2References

4Claims

0Family size

Assignee

Nokia Graetz · DE

Inventors

Norbert Thiel · Annaberg-Buchholz, DE
Volker Gerstle · Lorsch, DE
Rolf Zondler · Stuttgart, DE
Otto Lederle · Eßlingen, DE

Key dates

Filing date	May 17, 1988
Grant date	May 2, 1989
Priority date	—
Expiry date	May 17, 2008

Classification

Technology area (CPC H)Electricity
CPC primaryH01J2229/882
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In a color-picture tube, the conductive coating on the inside of the cone is a suspension without organic constituents. The conductive coating on the inside of the neck, which is contiguous to the conductive coating on the inside of the cone, consists of the aforementioned suspension with an addition of organic constituents. A sharp and scratch-resistant boundary between the conductive coating in the neck and the uncoated area of the neck is thus obtained.

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