1665993

Information

• Patent Grant
• 1665993

• References
• Source

• Patent Number

  1,665,993

• Date Filed

  Not available

• Date Issued

  Tuesday, April 10, 1928
  96 years ago

• CPC

  • C04B7/30 - from oil shale from oil shale residues; from lignite processing
  • Y02P40/145 - Clinker replacement by combustion residues

• US Classifications

  • 106 - Compositions: coating or plastic