3021916

Information

• Patent Grant
• 3021916

• References
• Source

• Patent Number

  3,021,916

• Date Filed

  Not available

• Date Issued

  Tuesday, February 20, 1962
  63 years ago

• CPC

  • E04B9/0442 - having a honeycomb core
  • E04B9/001 - characterised by provisions for heat or sound insulation
  • E04B9/0485 - containing a filling element
  • E04C2/365 - by honeycomb structures
  • E04B2001/748 - Honeycomb materials
  • E04B2001/8433 - with holes in their face
  • E04B2001/8442 - Tray type elements
  • Y10T29/49879 - Spaced wall tube or receptacle

• US Classifications

  • 181 - Acoustics
  • 029 - Metal working
  • 052 - Static structures