1840496

Information

• Patent Grant
• 1840496

• References
• Source

• Patent Number

  1,840,496

• Date Filed

  Not available

• Date Issued

  Tuesday, January 12, 1932
  93 years ago

• CPC

  • F01K9/02 - Arrangements or modifications of condensate or air pumps
  • 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