1855497

Information

• Patent Grant
• 1855497

• References
• Source

• Patent Number

  1,855,497

• Date Filed

  Not available

• Date Issued

  Tuesday, April 26, 1932
  92 years ago

• CPC

  • C25B13/06 - based on asbestos

• US Classifications

  • 162 - Paper making and fiber liberation
  • 204 - Chemistry: electrical and wave energy