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.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NVfiledCriticalPhilips Gloeilampenfabrieken NV
Priority to ES0008858UpriorityCriticalpatent/ES8858Y/en
Publication of ES8858UpublicationCriticalpatent/ES8858U/en
Application grantedgrantedCritical
Publication of ES8858YpublicationCriticalpatent/ES8858Y/en
An indirect heating cathode produced by the process claimed in patent no. 158.909 and that it encloses as insulating material a mass that adheres compactly to the inner wall of the cathode body and that is formed by one or more oxides of the alkali or alkaline earth metals. (Machine-translation by Google Translate, not legally binding)