1808905

Information

• Patent Grant
• 1808905

• References
• Source

• Patent Number

  1,808,905

• Date Filed

  Not available

• Date Issued

  Tuesday, June 9, 1931
  93 years ago

• CPC

  • C04B41/009 - characterised by the material treated
  • C04B14/108 - Shale, slate
  • C04B26/26 - Bituminous materials
  • C04B41/5323 - to make grain visible
  • Y10S264/63 - Processes of molding porous blocks

• US Classifications

  • 181 - Acoustics
  • 052 - Static structures
  • 264 - Plastic and nonmetallic article shaping or treating: processes