2121599

Information

• Patent Grant
• 2121599

• References
• Source

• Patent Number

  2,121,599

• Date Filed

  Not available

• Date Issued

  Tuesday, June 21, 1938
  86 years ago

• CPC

  • H01J13/28 - Selection of substances for gas filling Means for obtaining the desired pressure within the tube
  • H01J2893/0086 - Gas fill Maintaining or maintaining desired pressure Producing, introducing or replenishing gas or vapour during operation of the tube Getters Gas cleaning Electrode cleaning

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 417 - Pumps