2639996

Information

• Patent Grant
• 2639996

• References
• Source

• Patent Number

  2,639,996

• Date Filed

  Not available

• Date Issued

  Tuesday, May 26, 1953
  71 years ago

• CPC

  • H01J1/146 - with metals or alloys as an emissive material
  • Y10T428/2958 - Metal or metal compound in coating

• US Classifications

  • 428 - Stock material or miscellaneous articles
  • 420 - Alloys or metallic compositions