3830687

Information

• Patent Grant
• 3830687

• References
• Source

• Patent Number

  3,830,687

• Date Filed

  Not available

• Date Issued

  Tuesday, August 20, 1974
  50 years ago

• CPC

  • E04D1/265 - the roofing elements being rigid
  • B28B11/04 - for coating or applying engobing layers
  • B29C70/025 - with particular filler
  • B29C70/865 - completely encapsulated
  • E04B1/94 - against fire
  • E04D3/35 - Roofing slabs or stiff sheets comprising two or more layers
  • B29K2067/06 - Unsaturated polyesters
  • B29K2309/08 - Glass
  • B29K2309/12 - Asbestos
  • B29K2709/02 - Ceramics
  • B29K2709/08 - Glass
  • Y10S428/92 - Fire or heat protection feature
  • Y10T428/232 - Encased layer derived from inorganic settable ingredient

• US Classifications

  • 428 - Stock material or miscellaneous articles
  • 052 - Static structures