2725617

Information

• Patent Grant
• 2725617

• References
• Source

• Patent Number

  2,725,617

• Date Filed

  Not available

• Date Issued

  Tuesday, December 6, 1955
  69 years ago

• CPC

  • H01J19/00 - Details of vacuum tubes of the types covered by group H01J21/00
  • H01J2893/0023 - carbonising and other surface treatments
  • Y10S428/925 - Relative dimension specified
  • Y10S428/935 - Electroplating
  • Y10S428/936 - Chemical deposition
  • Y10T428/12049 - Nonmetal component
  • Y10T428/12076 - Next to each other
  • Y10T428/12625 - Free carbon containing component
  • Y10T428/12646 - Group VIII or IB metal-base
  • Y10T428/12937 - Co- or Ni-base component next to Fe-base component

• US Classifications

  • 428 - Stock material or miscellaneous articles
  • 313 - Electric lamp and discharge devices