2990491

Information

• Patent Grant
• 2990491

• References
• Source

• Patent Number

  2,990,491

• Date Filed

  Not available

• Date Issued

  Tuesday, June 27, 1961
  63 years ago

• CPC

  • H01J65/06 - Lamps in which a gas filling is excited to luminesce by radioactive material structurally associated with the lamp

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 359 - Optical: systems and elements