238000004519 manufacturing process Methods 0.000 title description 8.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 United States Radium Corp filed Critical United States Radium Corp Priority to US730705A priority Critical patent/US2028241A/en Application granted granted Critical Publication of US2028241A publication Critical patent/US2028241A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Original Assignee United States Radium Corp 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 or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US730705A Inventor John E Paul Current Assignee (The listed assignees may be inaccurate. Google Patents Method of making self-luminous elementÄownload PDF Info Publication number US2028241A US2028241A US730705A US73070534A US2028241A US 2028241 A US2028241 A US 2028241A US 730705 A US730705 A US 730705A US 73070534 A US73070534 A US 73070534A US 2028241 A US2028241 A US 2028241A Authority US United States Prior art keywords tube luminous self sealed tubes Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US2028241A - Method of making self-luminous element US2028241A - Method of making self-luminous element
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