1820962

Information

• Patent Grant
• 1820962

• References
• Source

• Patent Number

  1,820,962

• Date Filed

  Not available

• Date Issued

  Tuesday, September 1, 1931
  95 years ago

• CPC

  • D21H17/21 - of natural origin Derivatives thereof
  • D21H17/18 - forming new compounds in situ

• US Classifications

  • 162 - Paper making and fiber liberation
  • 076 - Metal tools and implements, making