3919822

Information

• Patent Grant
• 3919822

• References
• Source

• Patent Number

  3,919,822

• Date Filed

  Not available

• Date Issued

  Tuesday, November 18, 1975
  49 years ago

• CPC

  • E04D3/35 - Roofing slabs or stiff sheets comprising two or more layers
  • E04D1/22 - of specified materials not covered by any one of groups E04D1/14 - E04D1/205 , or of combinations of materials, where at least one is not covered by any one of groups E04D1/14 - E04D1/205
  • E04D3/18 - of specified materials, or of combinations of materials, not covered by any of groups E04D3/04, E04D3/06 or E04D3/16

• US Classifications

  • 052 - Static structures