Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
Publication of GB452337ApublicationCriticalpatent/GB452337A/en
452,337. Glass manufacture. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Patent Treuhand Ges. f³r Elektrische Gl³hlampen ; 11, Ehrenbergstrasse, Berlin) June 13, 1935, No. 17086. Drawings to Specification. [Class 56] [See also Group XL] The outer jacket of an electric discharge device adapted to emit ultra-violet radiation consists of a glass transmitting ultra-violet but substantially no visible light. In an example, a soft glass has 3¢ per cent each of nickel and cobalt oxides dispersed within it, and transmits radiation below 4000 A‹.