3640040

Information

• Patent Grant
• 3640040

• References
• Source

• Patent Number

  3,640,040

• Date Filed

  Not available

• Date Issued

  Tuesday, February 8, 1972
  52 years ago

• CPC

  • E04B5/21 - Cross-ribbed floors
  • E04B5/28 - Cross-ribbed floors

• US Classifications

  • 052 - Static structures
  • 249 - Static molds