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.)
Varian Medical Systems Inc
Original Assignee
Varian Associates Inc
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
Priority claimed from US91837Aexternal-prioritypatent/US3197945A/en
Application filed by Varian Associates IncfiledCriticalVarian Associates Inc
Priority to FR889324ApriorityCriticalpatent/FR81223E/fr
Application grantedgrantedCritical
Publication of FR81223EpublicationCriticalpatent/FR81223E/fr
H01J41/00—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas; Discharge tubes for evacuation by diffusion of ions
H01J41/12—Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps
FR889324A1961-02-271962-02-27Procédé et appareil pour réaliser des vides extrêmement poussés
ExpiredFR81223E
(fr)