1775531

Information

• Patent Grant
• 1775531

• References
• Source

• Patent Number

  1,775,531

• Date Filed

  Not available

• Date Issued

  Tuesday, September 9, 1930
  94 years ago

• CPC

  • H01J13/28 - Selection of substances for gas filling Means for obtaining the desired pressure within the tube
  • H01J13/32 - Cooling arrangements Heating arrangements
  • 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