3620870

Information

• Patent Grant
• 3620870

• References
• Source

• Patent Number

  3,620,870

• Date Filed

  Not available

• Date Issued

  Tuesday, November 16, 1971
  53 years ago

• CPC

  • E04C2/326 - with corrugations, incisions or reliefs in more than one direction of the element
  • B31D3/002 - Methods for making cellular structures; Cellular structures
  • E04C2/3405 - spaced apart by profiled spacer sheets
  • E04C2002/3422 - with polygonal dimples
  • E04C2002/3472 - with multiple layers of profiled spacer sheets
  • E04C2002/3494 - Apparatus for making profiled spacer sheets
  • Y10T156/1003 - by separating laminae between spaced secured areas [e.g., honeycomb expanding]
  • Y10T428/24174 - including sheet or component perpendicular to plane of web or sheet
  • Y10T428/24661 - Forming, or cooperating to form cells

• US Classifications

  • 156 - Adhesive bonding and miscellaneous chemical manufacture
  • 428 - Stock material or miscellaneous articles