3580739

Information

• Patent Grant
• 3580739

• References
• Source

• Patent Number

  3,580,739

• Date Filed

  Not available

• Date Issued

  Tuesday, May 25, 1971
  53 years ago

• CPC

  • H01J19/30 - characterised by the material
  • H01J2893/0019 - Chemical composition and manufacture
  • H01J2893/002 - chemical
  • Y10T428/12042 - Porous component
  • Y10T428/12146 - Nonmetal particles in a component
  • Y10T428/12361 - having aperture or cut
  • Y10T428/12812 - Diverse refractory group metal-base components: alternative to or next to each other

• US Classifications

  • 428 - Stock material or miscellaneous articles
  • 313 - Electric lamp and discharge devices
  • 419 - Powder metallurgy processes