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Publication of FR787877ApublicationCriticalpatent/FR787877A/en
H01K1/52—Means for obtaining or maintaining the desired pressure within the vessel
H01K1/54—Means for absorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering
H01K1/56—Means for absorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering characterised by the material of the getter
FR787877D1934-06-261934-06-26
Improvement in the constitution of the gas atmosphere of electric lamps
ExpiredFR787877A
(en)