1791538

Information

• Patent Grant
• 1791538

• References
• Source

• Patent Number

  1,791,538

• Date Filed

  Not available

• Date Issued

  Tuesday, February 10, 1931
  93 years ago

• CPC

  • D21H13/34 - Protein fibres
  • D21H5/1209 - of protein fibres
  • D21H13/42 - Asbestos

• US Classifications

  • 162 - Paper making and fiber liberation
  • 036 - Boots, shoes, and leggings