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.)
Expired
Application number
GB1322741A
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NVfiledCriticalPhilips Gloeilampenfabrieken NV
Priority to GB1322741ApriorityCriticalpatent/GB552718A/en
Publication of GB552718ApublicationCriticalpatent/GB552718A/en
Cleaning And De-Greasing Of Metallic Materials By Chemical Methods
(AREA)
Management, Administration, Business Operations System, And Electronic Commerce
(AREA)
Abstract
552,718. Thermionic valves. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). Oct. 14, 1941, No. 13227. Drawings to Specification. [Class 39 (i)] The subject-matter is identical with that of Specification 602,361, [Group XL (a)]. Specification 538,198 is referred to.
GB1322741A1941-10-141941-10-14Improvements in or relating to multi-grid electron discharge tubes
ExpiredGB552718A
(en)